| Team Name | Roster | League Name | Level | G | W | L | Pct | GBL | Rk | RF | RA | Diff | Manager | Ballpark |
| Washington Nationals | Stats -- Roster | National League | MLB | 162 | 96 | 66 | .593 | -- | 1 | 686 | 555 | +131 | Matt Williams | Nationals Park |
| Syracuse Chiefs | Stats -- Roster | International League | AAA | 147 | 81 | 62 | .566 | -- | 1 | 668 | 554 | +114 | Billy Gardner | NBT Bank Stadium |
| Harrisburg Senators | Stats -- Roster | Eastern League | AA | 119 | 53 | 89 | .373 | 26.0 | 6 | 580 | 735 | -155 | Brian Daubach | Metro Bank Park |
| Potomac Nationals | Stats -- Roster | Carolina League | A+ | 144 | 78 | 58 | .574 | -- | 1 | 635 | 627 | +8 | Tripp Keister | G. Richard Pfitzner Stadium |
| Hagerstown Suns | Stats -- Roster | South Atlantic League | A | 153 | 87 | 53 | .621 | -- | 2 | 699 | 575 | +124 | Patrick Anderson | Municipal Stadium |
| Auburn Doubledays | Stats -- Roster | New York-Penn League | A- | 100 | 34 | 41 | .453 | 13.5 | 3 | 299 | 332 | -33 | Gary Cathcart | Falcon Park II |
| Gulf Coast Nationals | Stats -- Roster | Gulf Coast League | Rk | 91 | 25 | 35 | .417 | 12.0 | 4 | 259 | 319 | -60 | Michael Barrett | Space Coast Stadium |
| Dominican Nationals | Stats -- Roster | Dominican Summer League | Rk | 108 | 42 | 28 | .600 | 8.5 | 3 | 433 | 375 | +58 | ||
| Organizational Totals: | 928 | 496 | 432 | .534 | 5 | 4259 | 4072 | +187 | ||||||
2014 Organizational Org Roster | Top | PREV NEXT | Major Leaguers | Active Players | 1st Round Draft Picks | Still Active on Roster |
| Player Name | Pos | Team(s) | Ht | Wt | B-T | BornDate | Age | Place | HiLvl | Stat Years | MLB Years | Draft Information | College(s) | Status | Current Org (Level) |
| Osvaldo Abreu | SS | Auburn (A-) | 6-0 | 170 | R-R | 1994-06-13 | 20 | La Romana,Dom Rep | AA | 2012-2018 | - | Free Agent | - (MLB) | ||
| Carlos Acevedo | P | DSL Nationals (Rk) | 6-3 | 200 | R-R | 1994-09-27 | 19 | La Vega,Dom Rep | A+ | 2014-2018 | - | Minors | Washington Nationals (A+) | ||
| Younaifred Aguero | 3B | GCL Nationals (Rk) | 6-2 | 170 | R-R | 1993-04-10 | 21 | Barquisimeto,Venezuela | RK | 2012-2015 | - | Free Agent | (MLB) | ||
| Telmito Agustin | OF | DSL Nationals (Rk) | 5-10 | 160 | L-L | 1996-10-09 | 17 | Charlotte Amalie,Virgin Islands | A+ | 2014-2018 | - | Minors | Washington Nationals (A+) | ||
| Gabriel Alfaro | P | Harrisburg (AA) | 6-4 | 190 | R-R | 1983-06-14 | 31 | Puerto Ordaz,Venezuela | AAA | 2005-2016 | - | International | (MLB) | ||
| Brenton Allen | OF | Auburn (A-) | 6-1 | 200 | L-L | 1991-11-02 | 22 | Cerritos,California | A- | 2011-2014 | - | 2013-20- 616-WAS | UCLA | Free Agent | (MLB) |
| Thomas Alvarez | 2B | GCL Nationals (Rk) | 6-1 | 165 | R-R | 1995-02-15 | 19 | Camden,New Jersey | RK | 2012-2015 | - | Free Agent | (MLB) | ||
| Dixon Anderson | P | Hagerstown (A) | 6-5 | 225 | R-R | 1989-07-02 | 24 | Berkeley,California | A | 2009-2014 | - | 2011- 9- 277-WAS | California | Retired | (MLB) |
| Michael Archibald | P | DSL Nationals (Rk) | 6-2 | 165 | L-L | 1995-03-15 | 19 | Santo Domingo,Dom Rep | RK | 2014-2016 | - | (MLB) | |||
| Aroon Avila | P | DSL Nationals (Rk) | 6-3 | 175 | R-R | 1997-05-26 | 17 | Caracas,Venezuela | RK | 2014-2015 | - | 2014- UDFA-WAS | (MLB) | ||
| Kyle Bacak | C | GCL Nationals (Rk) Auburn (A-) | 5-9 | 165 | R-R | 1991-11-15 | 22 | Anchorage,Alaska | A- | 2011-2014 | - | 2014-25- 754-WAS | Houston, Texas Christian U., San Jacinto Col | Free Agent | (MLB) |
| Connor Bach | P | GCL Nationals (Rk) Auburn (A-) | 6-6 | 187 | L-L | 1992-06-24 | 22 | Clifton,Virginia | A | 2011-2018 | - | 2014-21- 634-WAS | Virginia Military Institute | Minors | Los Angeles Angels (MLB) |
| Dakota Bacus | P | Potomac (A+) | 6-2 | 190 | R-R | 1991-04-02 | 23 | Moline,Illinois | AAA | 2010-2018 | - | 2012- 9- 289-OAK | Indiana St, Southeastern CC | Minors | Washington Nationals (AA) |
| Jeyner Baez | C | DSL Nationals (Rk) | 6-1 | 175 | R-R | 1995-07-25 | 18 | El Tigre,Venezuela | A | 2014-2018 | - | Free Agent | - (MLB) | ||
| Joan Baez | P | DSL Nationals (Rk) GCL Nationals (Rk) | 6-3 | 190 | R-R | 1994-12-26 | 19 | San Cristobal,Dom Rep | A+ | 2014-2018 | - | 2014- UDFA-WAS | Minors | Washington Nationals (A+) | |
| Cory Bafidis | P | Auburn (A-) | 6-0 | 190 | L-L | 1990-08-22 | 23 | Brownwood,Texas | A | 2010-2014 | - | 2013-18- 556-WAS | Texas Tech U., Midland Col, Texas Wesleyan U. | Free Agent | (MLB) |
| Isaac Ballou | OF | Hagerstown (A) Potomac (A+) | 6-2 | 178 | B-R | 1990-03-17 | 24 | Smithfield,Virginia | AAA | 2010-2017 | - | 2013-15- 466-WAS | Marshall U. | Free Agent | (MLB) |
| Brandon Bantz | C | Harrisburg (AA) | 6-1 | 211 | R-R | 1987-01-07 | 27 | Mansfield,Texas | MLB | 2006-2015 | 2013-2013 | 2009-30- 893-SEA | Dallas Baptist U. | Free Agent | (MLB) |
| Aaron Barrett | P | Syracuse (AAA) Washington (MLB) | 6-4 | 200 | R-R | 1988-01-02 | 26 | Evansville,Indiana | MLB | 2007-2018 | 2014-2015 | 2010- 9- 266-WAS | Mississippi, Wabash Valley Col | Free Agent | - (MLB) |
| Colin Bates | P | Harrisburg (AA) | 6-1 | 179 | R-R | 1988-03-10 | 26 | LaGrange,Illinois | AA | 2008-2015 | - | 2010-23- 686-WAS | North Carolina | Minors | Washington Nationals (MLB) |
| Rafael Bautista | OF | Hagerstown (A) | 6-2 | 165 | R-R | 1993-03-08 | 21 | Santo Domingo,Dom Rep | MLB | 2012-2018 | 2017-2018 | 2012- UDFA-WAS | Houston Astros (AAA) | ||
| Robert Benincasa | P | Potomac (A+) Harrisburg (AA) | 6-2 | 180 | R-R | 1990-09-05 | 23 | Tampa,Florida | AA | 2010-2016 | - | 2012- 7- 234-WAS | Florida St | Minors | Washington Nationals (MLB) |
| Juan Bermudez | P | DSL Nationals (Rk) | 6-2 | 180 | R-R | 1994-09-29 | 19 | Villa de Cura,Venezuela | RK | 2014-2015 | - | Minors | Washington Nationals (MLB) | ||
| Jerry Blevins | P | Washington (MLB) | 6-6 | 185 | L-L | 1983-09-06 | 30 | Johnson City,Tennessee | MLB | 2002-2018 | 2007-2018 | 2004-17- 516-CHN | Dayton | Free Agent | (MLB) |
| Justin Bloxom | 1B | Harrisburg (AA) | 6-1 | 196 | B-R | 1988-04-29 | 26 | Farmington,New Mexico | AA | 2007-2014 | - | 2009-11- 322-WAS | Kansas St | Free Agent | (MLB) |
| James Bourque | P | GCL Nationals (Rk) Auburn (A-) | 6-4 | 165 | R-R | 1993-07-09 | 20 | Ann Arbor,Michigan | AA | 2012-2018 | - | 2014-14- 424-WAS | Michigan | Active | Washington Nationals (MLB) |
| Brett Brach | P | Potomac (A+) Harrisburg (AA) | 6-3 | 185 | L-R | 1988-03-29 | 26 | Freehold,New Jersey | AAA | 2007-2015 | - | 2009-10- 305-CLE | Monmouth U. | Free Agent | (MLB) |
| Emmanuel Burriss | SS | Syracuse (AAA) | 6-0 | 170 | B-R | 1985-01-17 | 29 | Washington,DC | MLB | 2004-2017 | 2008-2016 | 2006- 1- 33-SFN | Kent St | Free Agent | (MLB) |
| Asdrubal Cabrera | SS | Washington (MLB) | 6-0 | 185 | B-R | 1985-11-13 | 28 | Puerto La Cruz,Venezuela | MLB | 2004-2018 | 2007-2018 | 2002- UDFA-SEA | Free Agent | (MLB) | |
| Mitch Canham | C-1B | Harrisburg (AA) | 6-2 | 215 | L-R | 1984-09-25 | 29 | Richland,Washington | AAA | 2004-2015 | - | 2007- 1- 57-SDN | Oregon St | Free Agent | (MLB) |
| D.K. Carey | OF | Auburn (A-) | 6-3 | 185 | R-R | 1991-11-14 | 22 | Fort Myers,Florida | A+ | 2011-2018 | - | 2014- 7- 214-WAS | Miami | Free Agent | (MLB) |
| Xavier Cedeno | P | Syracuse (AAA) Washington (MLB) | 6-1 | 165 | L-L | 1986-08-26 | 27 | Guayanilla,Puerto Rico | MLB | 2005-2018 | 2011-2018 | 2004-31- 920-COL | Miami-Dade Col | Free Agent | (MLB) |
| Angher Cespedes | P | DSL Nationals (Rk) | 6-1 | 190 | R-R | 1994-07-25 | 19 | Santo Domingo,Dom Rep | A- | 2014-2016 | - | Free Agent | (MLB) | ||
| Fiyeral Charlis | P | DSL Nationals (Rk) | 6-2 | 180 | R-R | 1994-09-17 | 19 | Barahona,Dom Rep | RK | 2013-2014 | - | (MLB) | |||
| Austin Chubb | C | Auburn (A-) Hagerstown (A) | 6-2 | 220 | R-R | 1989-04-17 | 25 | Lake Mary,Florida | AAA | 2009-2015 | - | 2012-21- 654-WAS | Florida So.Col, State Col Florida Manatee-Sarasota | Free Agent | (MLB) |
| Tyler Clippard | P | Washington (MLB) | 6-3 | 170 | R-R | 1985-02-14 | 29 | Lexington,Kentucky | MLB | 2003-2018 | 2007-2018 | 2003- 9- 274-NYA | Free Agent | (MLB) | |
| A.J. Cole | P | Harrisburg (AA) Syracuse (AAA) | 6-5 | 200 | R-R | 1992-01-05 | 22 | Winter Springs,Florida | MLB | 2010-2018 | 2015-2018 | 2010- 4- 116-WAS | Active | New York Yankees (MLB) | |
| Andrew Cooper | P | Hagerstown (A) | 6-0 | 190 | R-R | 1992-06-27 | 22 | Rocklin,California | A | 2011-2018 | - | 2013-12- 376-WAS | Sierra Col | Free Agent | (MLB) |
| Aldrem Corredor | OF | GCL Nationals (Rk) | 6-0 | 202 | L-L | 1995-10-27 | 18 | Miranda,Venezuela | A+ | 2013-2018 | - | 2012- UDFA-WAS | Minors | Washington Nationals (A+) | |
| John Costa | P | GCL Nationals (Rk) | 6-2 | 180 | R-R | 1993-05-01 | 21 | West Palm Beach,Florida | RK | 2012-2014 | - | 2013-13- 406-WAS | Palm Beach St, Florida International U. | Free Agent | (MLB) |
| Austin Davidson | IF | Auburn (A-) Hagerstown (A) | 6-0 | 175 | L-R | 1993-01-03 | 21 | Oxnard,California | AA | 2012-2018 | - | 2014-13- 394-WAS | Pepperdine U. | Minors | Washington Nationals (AA) |
| Cody Davis | P | Hagerstown (A) Potomac (A+) | 5-9 | 170 | R-R | 1990-07-21 | 23 | Loxahatchee,Florida | A+ | 2010-2015 | - | Tampa, Hillsborough CC | Free Agent | (MLB) | |
| Weston Davis | P | GCL Nationals (Rk) | 6-3 | 185 | R-R | 1996-07-06 | 17 | Bradenton,Florida | A | 2014-2017 | - | 2014-11- 334-WAS | Minors | Washington Nationals (A) | |
| Kida De La Cruz | P | GCL Nationals (Rk) | 6-5 | 240 | R-R | 1994-08-10 | 19 | Miami,Florida | A+ | 2014-2018 | - | 2014-28- 844-WAS | Volunteer St CC | Minors | Los Angeles Angels (A+) |
| Manny Delcarmen | P | Syracuse (AAA) | 6-2 | 190 | R-R | 1982-02-16 | 32 | Boston,Massachusetts | MLB | 2001-2018 | 2005-2010 | 2000- 2- 62-BOS | Free Agent | (MLB) | |
| Paul Demny | P | Potomac (A+) Harrisburg (AA) | 6-3 | 220 | R-R | 1989-08-03 | 24 | Houston,Texas | AAA | 2008-2016 | - | 2008- 6- 181-WAS | Blinn Col | Free Agent | (MLB) |
| Cody Dent | 2B-SS | Hagerstown (A) Potomac (A+) | 5-11 | 180 | L-R | 1991-08-01 | 22 | St. Louis,Missouri | A+ | 2010-2016 | - | 2013-22- 676-WAS | Florida | Free Agent | (MLB) |
| Matthew Derosier | P | Auburn (A-) | 6-2 | 200 | R-R | 1994-07-13 | 19 | Lakeside,California | A+ | 2013-2018 | - | 2013-24- 736-WAS | Southwestern Col | Free Agent | - (MLB) |
| Ian Desmond | SS | Washington (MLB) | 6-2 | 185 | R-R | 1985-09-20 | 28 | Sarasota,Florida | MLB | 2004-2018 | 2009-2018 | 2004- 3- 84-MON | Active | Colorado Rockies (MLB) | |
| Ross Detwiler | P | Washington (MLB) | 6-5 | 185 | R-L | 1986-03-06 | 28 | St. Louis,Missouri | MLB | 2005-2018 | 2007-2018 | 2007- 1- 6-WAS | Missouri St | Free Agent | - (MLB) |
| Robbie Dickey | P | GCL Nationals (Rk) Auburn (A-) Hagerstown (A) | 6-3 | 205 | R-R | 1994-04-06 | 20 | Austin,Texas | A | 2013-2016 | - | 2014- 4- 124-WAS | Blinn Col | Minors | Washington Nationals (A) |
| Ian Dickson | P | Potomac (A+) | 6-5 | 190 | R-R | 1990-09-16 | 23 | Northport,New York | A+ | 2009-2015 | - | 2011-35-1059-CHN | Lafayette Col | Free Agent | (MLB) |
| Wilmer Difo | SS-2B | Hagerstown (A) | 6-0 | 175 | R-R | 1992-04-02 | 22 | Santiago de los Caballeros,Dom Rep | MLB | 2010-2018 | 2015-2018 | 2011- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Greg Dobbs | 1B | Syracuse (AAA) Washington (MLB) | 6-1 | 205 | L-R | 1978-07-02 | 35 | Los Angeles,California | MLB | 2001-2014 | 2004-2014 | 2001- 0- 0-SEA | Oklahoma, Riverside CC | Free Agent | (MLB) |
| Brian Dupra | P | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-3 | 198 | R-R | 1988-12-15 | 25 | Rochester,New York | AAA | 2008-2017 | - | 2011- 7- 217-WAS | Notre Dame | Free Agent | (MLB) |
| Cutter Dykstra | 3B-2B | Auburn (A-) Harrisburg (AA) | 5-11 | 180 | R-R | 1989-06-29 | 25 | Thousand Oaks,California | AAA | 2008-2016 | - | 2008- 2- 54-MIL | Free Agent | (MLB) | |
| Pedro Encarnacion | P | GCL Nationals (Rk) Potomac (A+) | 6-4 | 175 | R-R | 1991-06-26 | 23 | Nizao,Dom Rep | A+ | 2010-2014 | - | Free Agent | (MLB) | ||
| Randy Encarnacion | OF | GCL Nationals (Rk) | 6-3 | 180 | R-R | 1994-07-31 | 19 | Batey Santana De Uvilla,Dom Rep | A | 2011-2017 | - | Free Agent | (MLB) | ||
| Paolo Espino | P | Harrisburg (AA) Syracuse (AAA) | 5-10 | 190 | R-R | 1987-01-10 | 27 | Panama City,Panama | MLB | 2007-2018 | 2017-2017 | 2006-10- 311-CLE | Free Agent | - (MLB) | |
| Danny Espinosa | 2B | Washington (MLB) | 6-0 | 190 | B-R | 1987-04-25 | 27 | Santa Ana,California | MLB | 2006-2018 | 2010-2017 | 2008- 3- 87-WAS | Long Beach St | Free Agent | - (MLB) |
| Wirkin Estevez | P | GCL Nationals (Rk) Hagerstown (A) | 6-1 | 170 | R-R | 1992-03-15 | 22 | Santo Domingo,Dom Rep | AA | 2010-2018 | - | Minors | Washington Nationals (AA) | ||
| Diomedes Eusebio | 1B | Auburn (A-) | 6-0 | 185 | R-R | 1992-09-08 | 21 | San Pedro de Mac,Dom Rep | A | 2011-2017 | - | Free Agent | (MLB) | ||
| John Feliz | P | GCL Nationals (Rk) Auburn (A-) | 6-2 | 180 | R-R | 1993-10-28 | 20 | Santo Domingo,Dom Rep | A- | 2013-2015 | - | Minors | Washington Nationals (MLB) | ||
| David Fischer | P | GCL Nationals (Rk) Auburn (A-) | 6-5 | 175 | R-R | 1990-04-10 | 24 | Scotia,New York | A+ | 2009-2017 | - | 2012-18- 564-WAS | Connecticut | Free Agent | (MLB) |
| Doug Fister | P | Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-8 | 185 | L-R | 1984-02-04 | 30 | Merced,California | MLB | 2003-2018 | 2009-2018 | 2006- 7- 201-SEA | Merced Col, Fresno St | Free Agent | (MLB) |
| Darryl Florentino | OF | GCL Nationals (Rk) | 6-2 | 175 | L-R | 1996-01-01 | 18 | Santo Domingo,Dom Rep | A- | 2013-2016 | - | 2012- UDFA-WAS | Free Agent | (MLB) | |
| Anderson Franco | 3B | DSL Nationals (Rk) | 6-3 | 190 | R-R | 1997-08-15 | 16 | Bani,Dom Rep | A | 2014-2018 | - | 2013- UDFA-WAS | Minors | Washington Nationals (A) | |
| Kevin Frandsen | 1B | Washington (MLB) | 6-0 | 175 | R-R | 1982-05-24 | 32 | Los Gatos,California | MLB | 2001-2015 | 2006-2015 | 2004-12- 370-SFN | San Jose St | Free Agent | (MLB) |
| Steven Fuentes | P | DSL Nationals (Rk) | 6-2 | 175 | R-R | 1997-05-04 | 17 | Puerto Armuelles,Panama | A+ | 2014-2018 | - | Minors | Washington Nationals (A+) | ||
| Christian Garcia | P | Syracuse (AAA) | 6-4 | 175 | R-R | 1985-08-24 | 28 | Miami,Florida | MLB | 2004-2014 | 2012-2012 | 2004- 3- 99-NYA | Free Agent | (MLB) | |
| Yordani Garcia | P | DSL Nationals (Rk) | 6-5 | 180 | R-R | 1996-02-19 | 18 | Santo Domingo,Dom Rep | RK | 2014-2016 | - | (MLB) | |||
| Jeff Gardner | C | Auburn (A-) | 6-2 | 202 | L-R | 1992-01-21 | 22 | Louisville,Kentucky | A | 2011-2018 | - | 2014- 8- 244-WAS | Louisville | Free Agent | (MLB) |
| Rob Gilliam | P | Harrisburg (AA) | 6-1 | 195 | R-R | 1987-11-29 | 26 | Manassas,Virginia | AA | 2007-2014 | - | 2009- 8- 243-OAK | UNC Greensboro | Free Agent | (MLB) |
| Lucas Giolito | P | Hagerstown (A) | 6-6 | 230 | R-R | 1994-07-14 | 19 | Santa Monica,California | MLB | 2012-2018 | 2016-2018 | 2012- 1- 16-WAS | Active | Chicago White Sox (MLB) | |
| Gio Gonzalez | P | Potomac (A+) Washington (MLB) | 5-11 | 185 | R-L | 1985-09-19 | 28 | Hialeah,Florida | MLB | 2004-2018 | 2008-2018 | 2004- 1- 38-CHA | Free Agent | (MLB) | |
| Mike Gonzalez | P | Syracuse (AAA) | 6-2 | 213 | R-L | 1978-05-23 | 36 | Corpus Christi,Texas | MLB | 1997-2016 | 2003-2013 | 1997-30- 902-PIT | San Jacinto Col | Free Agent | - (MLB) |
| Brian Goodwin | OF | Syracuse (AAA) | 6-0 | 190 | L-R | 1990-11-02 | 23 | Rocky Mount,North Carolina | MLB | 2010-2018 | 2016-2018 | 2011- 1- 34-WAS | North Carolina, Miami-Dade Col | DL-10 | Kansas City Royals (AAA) |
| Garrett Gordon | OF | Auburn (A-) | 6-0 | 220 | R-R | 1993-02-26 | 21 | Saline,Michigan | A- | 2012-2015 | - | 2013-23- 706-WAS | Wabash Valley Col, Spring Arbor U. | Free Agent | (MLB) |
| Matt Grace | P | Harrisburg (AA) Syracuse (AAA) | 6-4 | 205 | L-L | 1988-12-14 | 25 | Torrance,California | MLB | 2008-2018 | 2015-2018 | 2010- 8- 236-WAS | UCLA | Active | Washington Nationals (MLB) |
| Hector Guance | P | DSL Nationals (Rk) | 6-6 | 200 | R-R | 1995-07-12 | 18 | San Cristobal,Dom Rep | A- | 2014-2018 | - | Minors | Baltimore Orioles (A-) | ||
| Sandy Guerrero | OF | DSL Nationals (Rk) | 6-1 | 175 | B-R | 1995-07-25 | 18 | Peravia,Dom Rep | RK | 2014-2014 | - | (MLB) | |||
| Angel Guillen | P | DSL Nationals (Rk) | 6-2 | 150 | R-R | 1997-01-24 | 17 | Maracay,Venezuela | A- | 2014-2018 | - | Minors | Washington Nationals (A-) | ||
| Cody Gunter | 3B | Auburn (A-) | 6-3 | 195 | L-R | 1994-04-18 | 20 | Flower Mound,Texas | A- | 2013-2016 | - | 2013- 6- 196-WAS | Grayson County Col | Free Agent | (MLB) |
| Kelvin Gutierrez | SS | GCL Nationals (Rk) | 6-3 | 185 | R-R | 1994-08-28 | 19 | Pimentel,Dom Rep | AA | 2013-2018 | - | Minors | Kansas City Royals (MLB) | ||
| Luis Guzman | OF | GCL Nationals (Rk) | 5-11 | 183 | L-L | 1995-09-10 | 18 | Santo Domingo,Dom Rep | A- | 2013-2015 | - | 2012- UDFA-WAS | Free Agent | (MLB) | |
| Rick Hague | 2B | Harrisburg (AA) | 6-2 | 185 | R-R | 1988-09-18 | 25 | Spring,Texas | AAA | 2008-2016 | - | 2010- 3- 83-WAS | Rice U. | Free Agent | (MLB) |
| Scott Hairston | RF-LF | Syracuse (AAA) Washington (MLB) | 6-0 | 190 | R-R | 1980-05-25 | 34 | Fort Worth,Texas | MLB | 2000-2014 | 2004-2014 | 2001- 3- 98-ARI | Central Arizona Col | Free Agent | (MLB) |
| Bryan Harper | P | Potomac (A+) Harrisburg (AA) | 6-4 | 180 | L-L | 1989-12-29 | 24 | Las Vegas,Nevada | AAA | 2009-2018 | - | 2011-30- 907-WAS | Cal St Northridge, Col. So.Nevada, South Carolina | Free Agent | - (MLB) |
| Bryce Harper | LF | Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-3 | 205 | L-R | 1992-10-16 | 21 | Las Vegas,Nevada | MLB | 2010-2018 | 2012-2018 | 2010- 1- 1-WAS | Col. So.Nevada | Free Agent | (MLB) |
| Travis Henke | P | Potomac (A+) | 6-6 | 241 | R-R | 1988-07-09 | 25 | Jefferson City,Missouri | A+ | 2008-2014 | - | 2011-22- 667-WAS | Arkansas-Little Rock, Jefferson Col | Free Agent | (MLB) |
| Tyler Herron | P | Harrisburg (AA) Syracuse (AAA) | 6-3 | 190 | R-R | 1986-08-05 | 27 | West Palm Beach,Florida | AAA | 2005-2018 | - | 2005- 1- 46-SLN | Free Agent | (MLB) | |
| Taylor Hill | P | Syracuse (AAA) Washington (MLB) | 6-3 | 200 | R-R | 1989-03-12 | 25 | Mount Juliet,Tennessee | MLB | 2008-2018 | 2014-2015 | 2011- 6- 187-WAS | Vanderbilt U. | Free Agent | - (MLB) |
| Neil Holland | P | Harrisburg (AA) Syracuse (AAA) | 5-11 | 180 | R-R | 1988-08-14 | 25 | Owensboro,Kentucky | AAA | 2008-2017 | - | 2010-11- 326-WAS | Louisville | Free Agent | (MLB) |
| L.J. Hollins | P | Hagerstown (A) | 6-3 | 185 | R-R | 1991-07-31 | 22 | Madison,Mississippi | A | 2011-2014 | - | 2012-29- 894-WAS | Chipola Col | Free Agent | (MLB) |
| Destin Hood | OF | Auburn (A-) Harrisburg (AA) Syracuse (AAA) | 6-1 | 180 | R-R | 1990-04-03 | 24 | Eight Mile,Alabama | MLB | 2008-2018 | 2016-2016 | 2008- 2- 55-WAS | Free Agent | - (MLB) | |
| Jeff Howell | C | Syracuse (AAA) | 6-0 | 200 | R-R | 1983-04-01 | 31 | Melbourne,Florida | AAA | 2004-2016 | - | 2005-10- 292-KCA | Florida So.Col, Indian River St | Free Agent | (MLB) |
| Zach Jackson | P | Harrisburg (AA) Syracuse (AAA) | 6-5 | 220 | L-L | 1983-05-13 | 31 | Latrobe,Pennsylvania | MLB | 2002-2015 | 2006-2009 | 2004- 1- 32-TOR | Louisville, Texas A&M U. | Free Agent | (MLB) |
| D.J. Jauss | P | GCL Nationals (Rk) | 6-1 | 183 | R-R | 1990-09-05 | 23 | West Palm Beach,Florida | RK | 2010-2014 | - | 2014-29- 874-WAS | East Carolina U., Massachusetts | Free Agent | (MLB) |
| Brian Jeroloman | C | Harrisburg (AA) | 6-0 | 195 | L-R | 1985-05-10 | 29 | Suffern,New York | AAA | 2004-2016 | - | 2006- 6- 180-TOR | Florida | Free Agent | (MLB) |
| Jose Jimenez | P | DSL Nationals (Rk) | 6-1 | 190 | L-L | 1996-12-07 | 17 | San Cristobal,Dom Rep | RK | 2014-2018 | - | 2013- UDFA-WAS | Minors | Washington Nationals (Rk) | |
| Jake Johansen | P | Hagerstown (A) | 6-6 | 235 | R-R | 1991-01-23 | 23 | Allen,Texas | AA | 2011-2018 | - | 2013- 2- 68-WAS | Dallas Baptist U. | Minors | Chicago White Sox (AA) |
| Sam Johns | P | GCL Nationals (Rk) Auburn (A-) Hagerstown (A) | 6-2 | 181 | R-R | 1991-07-12 | 22 | Bethalto,Illinois | A | 2010-2015 | - | 2014-31- 934-WAS | Evansville | Free Agent | (MLB) |
| Josh Johnson | IF | Syracuse (AAA) | 5-10 | 190 | B-R | 1986-01-11 | 28 | Tampa,Florida | AAA | 2004-2015 | - | 2004- 3- 85-KCA | Free Agent | (MLB) | |
| Taylor Jordan | P | Syracuse (AAA) Washington (MLB) | 6-3 | 190 | R-R | 1989-01-17 | 25 | Merritt Island,Florida | MLB | 2009-2018 | 2013-2015 | 2009- 9- 262-WAS | Free Agent | (MLB) | |
| Jake Joyce | P | Auburn (A-) | 5-11 | 188 | R-R | 1991-08-19 | 22 | Martinsville,Virginia | A- | 2010-2018 | - | 2013- 9- 286-WAS | Virginia Tech | Free Agent | (MLB) |
| Alec Keller | OF | Auburn (A-) | 6-1 | 185 | L-R | 1992-05-13 | 22 | Richmond,Virginia | AA | 2011-2018 | - | 2014-17- 514-WAS | Princeton U. | Minors | Washington Nationals (AA) |
| Conor Keniry | IF-OF | GCL Nationals (Rk) | 6-1 | 190 | L-R | 1991-12-02 | 22 | Milford,Connecticut | A | 2011-2015 | - | 2014-27- 814-WAS | Wake Forest U. | Free Agent | (MLB) |
| Kevin Keyes | 1B | Potomac (A+) Harrisburg (AA) | 6-3 | 225 | R-R | 1989-03-15 | 25 | Austin,Texas | AAA | 2008-2017 | - | 2010- 7- 206-WAS | Texas | Free Agent | (MLB) |
| Spencer Kieboom | C | Hagerstown (A) | 6-0 | 220 | R-R | 1991-03-16 | 23 | Mount Pleasant,South Carolina | MLB | 2010-2018 | 2016-2018 | 2012- 5- 174-WAS | Clemson U. | Active | Washington Nationals (MLB) |
| Jeff Kobernus | OF | Hagerstown (A) Potomac (A+) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-2 | 195 | R-R | 1988-06-30 | 26 | San Leandro,California | MLB | 2007-2017 | 2013-2014 | 2009- 2- 50-WAS | California | Free Agent | (MLB) |
| Erik Komatsu | OF | Syracuse (AAA) | 5-10 | 190 | L-L | 1987-10-01 | 26 | Camarillo,California | MLB | 2006-2015 | 2012-2012 | 2008- 8- 248-MIL | Cal St Fullerton, Vanguard So.California, Oxnard Col | Free Agent | (MLB) |
| Zach Kroenke | P | Harrisburg (AA) Syracuse (AAA) | 6-3 | 210 | R-L | 1984-04-21 | 30 | Lincoln,Nebraska | MLB | 2003-2014 | 2010-2011 | 2005- 5- 169-NYA | Nebraska | Free Agent | (MLB) |
| Aaron Laffey | P | Syracuse (AAA) | 6-1 | 178 | L-L | 1985-04-15 | 29 | Cumberland,Maryland | MLB | 2003-2018 | 2007-2015 | 2003-16- 468-CLE | Retired | - (MLB) | |
| Brandon Laird | 3B | Syracuse (AAA) | 6-1 | 205 | R-R | 1987-09-11 | 26 | Cypress,California | MLB | 2006-2017 | 2011-2013 | 2007-27- 844-NYA | Cypress Col | International | (MLB) |
| Bryan Langlois | OF | Auburn (A-) Hagerstown (A) | 6-1 | 205 | R-R | 1991-10-30 | 22 | Oak Park,California | A | 2013-2014 | - | 2014-20- 604-WAS | Pepperdine U. | Minors | Washington Nationals (MLB) |
| Adam LaRoche | 1B | Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-3 | 180 | L-L | 1979-11-06 | 34 | Orange,California | MLB | 2000-2015 | 2004-2015 | 2000-29- 880-ATL | Seminole St, Fort Scott CC | Retired | (MLB) |
| Quincy Latimore | OF | Harrisburg (AA) | 5-10 | 175 | R-R | 1989-02-03 | 25 | Raleigh,North Carolina | AAA | 2007-2017 | - | 2007- 4- 128-PIT | Free Agent | (MLB) | |
| Nick Lee | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) | 6-0 | 180 | L-L | 1991-01-13 | 23 | San Antonio,Texas | AA | 2010-2018 | - | 2011-18- 547-WAS | Weatherford Col | Minors | Washington Nationals (AA) |
| Sandy Leon | C | Syracuse (AAA) Washington (MLB) | 5-11 | 175 | B-R | 1989-03-13 | 25 | Caracas,Venezuela | MLB | 2007-2018 | 2012-2018 | 2007- UDFA-WAS | Active | Boston Red Sox (MLB) | |
| Cole Leonida | C | Potomac (A+) Harrisburg (AA) | 6-3 | 218 | R-R | 1988-12-25 | 25 | Aurora,Colorado | AA | 2008-2016 | - | 2010- 6- 176-WAS | Georgia Tech | Free Agent | (MLB) |
| Mitch Lively | P | Syracuse (AAA) | 6-5 | 230 | R-R | 1985-09-07 | 28 | Susanville,California | AAA | 2004-2017 | - | 2007-16- 492-COL | Sacramento St | Free Agent | (MLB) |
| Jose Lobaton | C | Washington (MLB) | 6-1 | 200 | B-R | 1984-10-21 | 29 | Portuguesa,Venezuela | MLB | 2003-2018 | 2009-2018 | 2002- UDFA-SDN | Minors | Seattle Mariners (MLB) | |
| Carlos Lopez | 1B | Hagerstown (A) | 6-1 | 193 | R-R | 1990-01-18 | 24 | Boynton Beach,Florida | A | 2009-2015 | - | 2012-12- 384-WAS | Wake Forest U. | Free Agent | (MLB) |
| Franklyn Lopez | P | DSL Nationals (Rk) | 6-3 | 190 | R-R | 1994-09-09 | 19 | Tamboril,Dom Rep | RK | 2014-2014 | - | (MLB) | |||
| Reynaldo Lopez | P | Auburn (A-) Hagerstown (A) | 6-0 | 185 | R-R | 1994-01-04 | 20 | San Pedro de Mac,Dom Rep | MLB | 2012-2018 | 2016-2018 | 2012- UDFA-WAS | Active | Chicago White Sox (MLB) | |
| Edwin Lora | 2B | GCL Nationals (Rk) | 6-1 | 150 | R-R | 1995-09-14 | 18 | Santo Domingo,Dom Rep | A+ | 2013-2018 | - | DL-7 | Washington Nationals (A+) | ||
| Jose Lozada | SS-3B | Harrisburg (AA) Syracuse (AAA) | 6-0 | 180 | B-R | 1985-12-29 | 28 | Las Piedras,Puerto Rico | AAA | 2005-2017 | - | 2008-17- 511-WAS | Bethune-Cookman U., Miami-Dade Col, Benedictine Col | Free Agent | (MLB) |
| Warner Madrigal | P | Harrisburg (AA) Syracuse (AAA) | 6-0 | 190 | R-R | 1984-03-21 | 30 | San Pedro de Mac,Dom Rep | MLB | 2003-2016 | 2008-2009 | 2001- UDFA-ANA | Free Agent | (MLB) | |
| Domenick Mancini | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 190 | R-R | 1993-09-28 | 20 | Weston,Florida | A- | 2014-2015 | - | 2014-12- 364-WAS | Miami-Dade Col, Florida Atl U. | Free Agent | (MLB) |
| Christopher Manno | P | Potomac (A+) Harrisburg (AA) | 6-2 | 170 | L-L | 1988-11-04 | 25 | Brooklyn,New York | AA | 2007-2014 | - | 2010-26- 776-WAS | Duke U. | Free Agent | (MLB) |
| Craig Manuel | C | Hagerstown (A) Potomac (A+) | 6-2 | 210 | L-R | 1990-05-22 | 24 | Rockville,Maryland | AAA | 2009-2015 | - | 2012-10- 324-WAS | Rice U. | Free Agent | (MLB) |
| Tyler Mapes | P | GCL Nationals (Rk) Auburn (A-) | 6-0 | 190 | R-R | 1991-07-18 | 22 | Dallas,Texas | AA | 2010-2018 | - | 2014-30- 904-WAS | Navy, Navarro Col, Tulane U. | Minors | Washington Nationals (AA) |
| Jose Marmolejos | 1B | Auburn (A-) | 6-1 | 185 | L-L | 1993-01-02 | 21 | Perth Amboy,New Jersey | AAA | 2011-2018 | - | Minors | Washington Nationals (AAA) | ||
| Alexander Marquez | C | Auburn (A-) | 5-11 | 190 | R-R | 1992-12-10 | 21 | Maunabo,Puerto Rico | A | 2010-2016 | - | 2010-29- 869-KCA | Free Agent | (MLB) | |
| Rafael Martin | P | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-2 | 195 | R-R | 1984-05-16 | 30 | San Fernando,California | MLB | 2007-2017 | 2015-2016 | 2010- UDFA-WAS | Free Agent | (MLB) | |
| Anderson Martinez | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 180 | R-R | 1993-02-22 | 21 | Barquisimeto,Venezuela | A- | 2011-2014 | - | Minors | Washington Nationals (MLB) | ||
| Andres Martinez | SS | DSL Nationals (Rk) | 6-1 | 170 | R-R | 1995-07-07 | 18 | Carrizal,Venezuela | A- | 2012-2017 | - | Free Agent | (MLB) | ||
| Estarlin Martinez | OF | Hagerstown (A) Potomac (A+) | 6-1 | 185 | R-R | 1992-03-08 | 22 | Bani,Dom Rep | A+ | 2010-2015 | - | Free Agent | (MLB) | ||
| Jason Martinson | SS | Harrisburg (AA) | 6-1 | 190 | R-R | 1988-10-15 | 25 | Bedford,Texas | AAA | 2008-2018 | - | 2010- 5- 146-WAS | Texas St | Free Agent | - (MLB) |
| David Masters | SS | Auburn (A-) Hagerstown (A) | 6-1 | 185 | R-R | 1993-04-23 | 21 | Lake St. Louis,Missouri | A+ | 2012-2018 | - | 2013-14- 436-WAS | Arkansas, Central Arizona Col | Minors | Washington Nationals (A+) |
| Ryan Mattheus | P | GCL Nationals (Rk) Syracuse (AAA) Washington (MLB) | 6-3 | 215 | R-R | 1983-11-10 | 30 | Elk Grove,California | MLB | 2003-2016 | 2011-2015 | 2003-19- 557-COL | Sacramento City Col | Free Agent | (MLB) |
| Chase McDowell | P-OF | GCL Nationals (Rk) Auburn (A-) | 6-2 | 185 | L-R | 1990-12-14 | 23 | College Station,Texas | A- | 2010-2014 | - | 2014-26- 784-WAS | Rice U. | Restricted | Washington Nationals (A-) |
| Scott McGregor | P | Harrisburg (AA) Syracuse (AAA) | 6-2 | 193 | R-R | 1986-12-19 | 27 | Liberty Township,Ohio | AAA | 2006-2016 | - | 2008-15- 455-SLN | Memphis | Free Agent | (MLB) |
| Nate McLouth | LF | Washington (MLB) | 5-11 | 174 | L-R | 1981-10-28 | 32 | Muskegon,Michigan | MLB | 2001-2014 | 2005-2014 | 2000-25- 749-PIT | Free Agent | (MLB) | |
| Mike McQuillan | 3B | Potomac (A+) | 5-11 | 165 | R-R | 1989-10-02 | 24 | Evergreen Park,Illinois | A+ | 2009-2014 | - | 2012-33-1014-WAS | Iowa | Free Agent | (MLB) |
| Willie Medina | SS-2B | Auburn (A-) Hagerstown (A) | 5-10 | 170 | B-R | 1991-01-25 | 23 | North Lauderdale,Florida | A | 2010-2014 | - | 2013-31- 946-WAS | High Point U., Seminole St Florida | Free Agent | (MLB) |
| Bryan Mejia | 2B | Auburn (A-) | 6-1 | 170 | B-R | 1994-03-02 | 20 | Bani,Dom Rep | A+ | 2011-2018 | - | Minors | Washington Nationals (A+) | ||
| Gilberto Mendez | P | Potomac (A+) | 6-0 | 165 | R-R | 1992-11-17 | 21 | Santo Domingo,Dom Rep | AA | 2011-2017 | - | Free Agent | (MLB) | ||
| Narciso Mesa | OF | Hagerstown (A) Potomac (A+) | 5-11 | 175 | R-R | 1991-11-16 | 22 | Azua,Dom Rep | A+ | 2010-2016 | - | Minors | Los Angeles Dodgers (MLB) | ||
| Brad Meyers | P | Harrisburg (AA) | 6-6 | 195 | R-R | 1985-09-13 | 28 | Santa Ana,California | AAA | 2005-2014 | - | 2007- 5- 160-WAS | Loyola Marymount U. | Free Agent | (MLB) |
| Brennan Middleton | IF | Hagerstown (A) | 6-1 | 185 | R-R | 1990-11-20 | 23 | Baton Rouge,Louisiana | A | 2010-2015 | - | 2013-10- 316-WAS | Tulane U. | Free Agent | (MLB) |
| Brandon Miller | OF | GCL Nationals (Rk) Auburn (A-) Potomac (A+) | 6-1 | 204 | R-R | 1989-10-08 | 24 | Tyrone,Georgia | A+ | 2009-2015 | - | 2012- 4- 144-WAS | Georgia Tech, NWFlorida St, Samford U. | Retired | (MLB) |
| Justin Miller | 3B-1B | Potomac (A+) | 6-0 | 180 | R-R | 1988-11-28 | 25 | Knoxville,Tennessee | A+ | 2008-2014 | - | 2010-18- 536-WAS | Middle Tennessee St | Free Agent | (MLB) |
| McKenzie Mills | P | GCL Nationals (Rk) | 6-4 | 205 | L-L | 1995-11-19 | 18 | Marietta,Georgia | AA | 2014-2018 | - | 2014-18- 544-WAS | Minors | Miami Marlins (A+) | |
| Richie Mirowski | P | Potomac (A+) Harrisburg (AA) | 6-2 | 190 | R-R | 1989-04-30 | 25 | San Mateo,California | AA | 2008-2016 | - | 2011-45-1357-WAS | Oklahoma Baptist U., Cuesta Col | Free Agent | (MLB) |
| Brett Mooneyham | P | Auburn (A-) Hagerstown (A) Potomac (A+) | 6-5 | 215 | L-L | 1990-01-24 | 24 | Atwater,California | A+ | 2009-2015 | - | 2012- 3- 111-WAS | Stanford U. | Free Agent | (MLB) |
| Tyler Moore | LF-1B | Syracuse (AAA) Washington (MLB) | 6-1 | 209 | R-R | 1987-01-30 | 27 | Laurel,Mississippi | MLB | 2007-2017 | 2012-2017 | 2008-16- 481-WAS | Mississippi St, Meridian CC | Free Agent | (MLB) |
| Jose Morales | P | GCL Nationals (Rk) | 6-3 | 180 | R-R | 1995-02-12 | 19 | San Juan de los Morros,Venezuela | A | 2013-2017 | - | Free Agent | (MLB) | ||
| Melvin Morel | P | DSL Nationals (Rk) | 6-2 | 185 | L-L | 1993-12-14 | 20 | Villa Riva,Dom Rep | RK | 2014-2017 | - | Free Agent | (MLB) | ||
| Israel Mota | OF | DSL Nationals (Rk) | 6-2 | 165 | R-R | 1996-01-03 | 18 | San Pedro de Mac,Dom Rep | A- | 2013-2017 | - | 2013- UDFA-WAS | Free Agent | (MLB) | |
| David Napoli | P | Auburn (A-) Hagerstown (A) | 5-10 | 170 | R-L | 1990-10-03 | 23 | New Orleans,Louisiana | A+ | 2010-2016 | - | 2013- 8- 256-WAS | Tulane U. | Free Agent | (MLB) |
| Sean Nicol | 3B | Harrisburg (AA) Syracuse (AAA) | 5-11 | 170 | R-R | 1986-09-25 | 27 | Scottsdale,Arizona | AAA | 2006-2014 | - | 2009-16- 472-WAS | Portland, San Diego | Free Agent | (MLB) |
| Khayyan Norfork | 3B-2B | Hagerstown (A) Potomac (A+) | 5-10 | 170 | R-R | 1989-01-19 | 25 | Jackson,Tennessee | AAA | 2010-2018 | - | 2011-23- 697-WAS | Tennessee, Jackson St CC | Free Agent | - (MLB) |
| Jose Nunez | P | DSL Nationals (Rk) | 6-4 | 175 | R-R | 1996-05-19 | 18 | Santiago,Dom Rep | RK | 2014-2014 | - | (MLB) | |||
| Randolph Oduber | OF | Potomac (A+) Harrisburg (AA) | 6-3 | 186 | R-L | 1989-03-18 | 25 | Paradera,Aruba | AA | 2009-2018 | - | 2010-32- 956-WAS | Western Oklahoma St | Free Agent | (MLB) |
| Ross Ohlendorf | P | GCL Nationals (Rk) Potomac (A+) Syracuse (AAA) | 6-4 | 235 | R-R | 1982-08-08 | 31 | Austin,Texas | MLB | 2002-2017 | 2007-2016 | 2004- 4- 116-ARI | Princeton U. | International | (MLB) |
| R.C. Orlan | P | Auburn (A-) Hagerstown (A) | 6-0 | 190 | R-L | 1990-09-28 | 23 | Bryn Mawr,Pennsylvania | AAA | 2010-2018 | - | 2012-30- 924-WAS | North Carolina | Minors | Cleveland Indians (MLB) |
| Oliver Ortiz | 1B | GCL Nationals (Rk) | 6-0 | 170 | L-L | 1996-05-06 | 18 | Santo Domingo,Dom Rep | A | 2013-2018 | - | Free Agent | - (MLB) | ||
| Travis Ott | P | Auburn (A-) Hagerstown (A) | 6-4 | 170 | L-L | 1995-06-29 | 19 | Shippensburg,Pennsylvania | AAA | 2013-2018 | - | 2013-25- 766-WAS | Minors | Tampa Bay Rays (AA) | |
| Matthew Page | OF | Auburn (A-) | 6-3 | 210 | L-L | 1991-10-22 | 22 | Redwood City,California | A+ | 2013-2017 | - | 2014-10- 304-WAS | Oklahoma Baptist U., Skyline Col | Free Agent | (MLB) |
| Francys Peguero | SS | DSL Nationals (Rk) | 6-2 | 170 | R-R | 1995-10-04 | 18 | Hato Mayor,Dom Rep | A- | 2013-2018 | - | Minors | Washington Nationals (A-) | ||
| Malvin Pena | P | DSL Nationals (Rk) | 6-2 | 180 | R-R | 1997-06-24 | 17 | Santo Domingo,Dom Rep | A | 2014-2018 | - | DL-7 | Washington Nationals (A) | ||
| Ronald Pena | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) | 6-4 | 210 | R-R | 1991-09-19 | 22 | West Palm Beach,Florida | AA | 2011-2018 | - | 2012-16- 504-WAS | Col. Charleston, Palm Beach St | Minors | Washington Nationals (AA) |
| Wilber Pena | P | DSL Nationals (Rk) | 6-2 | 185 | R-R | 1995-09-14 | 18 | Enriquillo,Dom Rep | A- | 2014-2016 | - | Minors | Washington Nationals (MLB) | ||
| Luis Perdomo | 1B | DSL Nationals (Rk) | 5-11 | 170 | L-L | 1997-05-21 | 17 | Trujillo,Venezuela | A- | 2014-2017 | - | Restricted | Washington Nationals (Rk) | ||
| Eury Perez | OF | GCL Nationals (Rk) Potomac (A+) Syracuse (AAA) | 6-0 | 180 | R-R | 1990-05-30 | 24 | San Luis,Dom Rep | MLB | 2009-2018 | 2012-2015 | 2007- UDFA-WAS | Free Agent | - (MLB) | |
| Stephen Perez | SS | Potomac (A+) | 5-11 | 175 | B-R | 1990-12-16 | 23 | Miami,Florida | AAA | 2010-2018 | - | 2012- 8- 264-WAS | Miami | Free Agent | - (MLB) |
| Ryan Perry | P | GCL Nationals (Rk) Harrisburg (AA) | 6-4 | 200 | R-R | 1987-02-13 | 27 | Pomona,California | MLB | 2006-2015 | 2009-2012 | 2008- 1- 21-DET | Arizona | Free Agent | (MLB) |
| Brock Peterson | 1B | Syracuse (AAA) | 6-3 | 200 | R-R | 1983-11-20 | 30 | Centralia,Washington | MLB | 2003-2015 | 2013-2013 | 2002-49-1450-MIN | Free Agent | (MLB) | |
| Neivy Pilier | 3B | DSL Nationals (Rk) | 6-1 | 185 | R-R | 1996-08-01 | 17 | La Romana,Dom Rep | RK | 2013-2014 | - | 2012- UDFA-WAS | (MLB) | ||
| Davinson Pimentel | 1B | DSL Nationals (Rk) | 5-9 | 170 | R-R | 1997-02-12 | 17 | Santiago,Dom Rep | RK | 2014-2017 | - | Free Agent | (MLB) | ||
| Francisco Pinto | P | DSL Nationals (Rk) | 6-2 | 165 | R-R | 1997-04-26 | 17 | San Cristobal,Venezuela | RK | 2014-2015 | - | (MLB) | |||
| Nick Pivetta | P | Hagerstown (A) | 6-5 | 210 | R-R | 1993-02-14 | 21 | Victoria,BC | MLB | 2012-2018 | 2017-2018 | 2013- 4- 136-WAS | New Mexico Junior Col | Active | Philadelphia Phillies (MLB) |
| Will Piwnica-Worms | OF | Potomac (A+) | 6-2 | 190 | R-R | 1990-04-01 | 24 | St. Louis,Missouri | A+ | 2009-2014 | - | Duke U. | Restricted | Washington Nationals (A+) | |
| Shawn Pleffner | 1B | Potomac (A+) | 6-4 | 220 | L-R | 1989-08-17 | 24 | Washington,DC | AA | 2008-2017 | - | 2011-26- 787-WAS | Tampa, Tallahassee CC | Free Agent | (MLB) |
| Cole Plouck | P | GCL Nationals (Rk) | 6-2 | 175 | L-L | 1994-04-25 | 20 | Tucson,Arizona | A- | 2013-2015 | - | 2014-16- 484-WAS | Pima CC | Free Agent | (MLB) |
| Omar Poveda | P | GCL Nationals (Rk) Harrisburg (AA) Syracuse (AAA) | 6-4 | 185 | R-R | 1987-09-28 | 26 | Maracia,Venezuela | AAA | 2005-2014 | - | Free Agent | (MLB) | ||
| Matt Purke | P | Harrisburg (AA) | 6-3 | 175 | L-L | 1990-07-17 | 23 | Spring,Texas | MLB | 2010-2018 | 2016-2016 | 2011- 3- 96-WAS | Texas Christian U. | Free Agent | - (MLB) |
| Gilberto Ramirez | OF | DSL Nationals (Rk) GCL Nationals (Rk) | 6-4 | 180 | R-R | 1992-11-14 | 21 | - | RK | 2014-2015 | - | Free Agent | (MLB) | ||
| Jean Ramirez | P | GCL Nationals (Rk) | 6-4 | 180 | R-R | 1994-10-24 | 19 | Bonao,Dom Rep | RK | 2013-2014 | - | Free Agent | (MLB) | ||
| Joshual Ramirez | 2B | DSL Nationals (Rk) | 6-2 | 185 | R-R | 1996-05-20 | 18 | Santo Domingo,Dom Rep | A- | 2013-2017 | - | Free Agent | (MLB) | ||
| Nector Ramirez | P | DSL Nationals (Rk) | 6-0 | 170 | R-R | 1996-09-04 | 17 | San Pedro de Mac,Dom Rep | A- | 2014-2018 | - | Minors | Washington Nationals (Rk) | ||
| Yonathan Ramirez | P | DSL Nationals (Rk) | 5-11 | 165 | L-L | 1997-04-13 | 17 | Azua,Dom Rep | A | 2014-2018 | - | 2014- UDFA-WAS | Free Agent | - (MLB) | |
| David Ramos | P | Auburn (A-) Hagerstown (A) | 6-0 | 175 | R-R | 1991-09-13 | 22 | Guacara,Venezuela | A | 2012-2017 | - | Free Agent | (MLB) | ||
| Wilson Ramos | C | Hagerstown (A) Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-0 | 178 | R-R | 1987-08-10 | 26 | Valencia,Venezuela | MLB | 2006-2018 | 2010-2018 | 2004- UDFA-MIN | Free Agent | (MLB) | |
| Caleb Ramsey | OF | Harrisburg (AA) | 6-2 | 175 | L-R | 1988-10-07 | 25 | Houston,Texas | AAA | 2008-2017 | - | 2011-11- 337-WAS | Houston | Free Agent | (MLB) |
| Brian Rauh | P | Potomac (A+) | 6-2 | 200 | R-R | 1991-07-23 | 22 | Lake Forest,California | AA | 2010-2015 | - | 2012-11- 354-WAS | Chapman U. | Minors | Washington Nationals (MLB) |
| Raudy Read | C | Auburn (A-) | 6-0 | 170 | R-R | 1993-10-29 | 20 | San Jose de Ocoa,Dom Rep | MLB | 2011-2018 | 2017-2017 | 2011- UDFA-MIA | Active | Washington Nationals (MLB) | |
| Jakson Reetz | C | GCL Nationals (Rk) | 6-1 | 195 | R-R | 1996-01-03 | 18 | Hickman,Nebraska | A+ | 2014-2018 | - | 2014- 3- 93-WAS | Minors | Washington Nationals (A+) | |
| Tony Renda | 2B | Potomac (A+) | 5-10 | 170 | R-R | 1991-01-24 | 23 | Santa Rosa,California | MLB | 2010-2018 | 2016-2018 | 2012- 2- 80-WAS | California | Minors | Boston Red Sox (MLB) |
| Anthony Rendon | 2B | Washington (MLB) | 5-11 | 170 | R-R | 1990-06-06 | 24 | Houston,Texas | MLB | 2009-2018 | 2013-2018 | 2011- 1- 6-WAS | Rice U. | Active | Washington Nationals (MLB) |
| Luis Rengel | 2B | DSL Nationals (Rk) | 6-0 | 165 | R-R | 1995-07-20 | 18 | San Felix,Venezuela | RK | 2014-2014 | - | Free Agent | (MLB) | ||
| Luis Reyes | P | GCL Nationals (Rk) Auburn (A-) | 6-2 | 175 | R-R | 1994-09-26 | 19 | Sabana Grande de Palenque,Dom Rep | AA | 2013-2018 | - | 2012- UDFA-WAS | Minors | Washington Nationals (AA) | |
| Yorlin Reynoso | P | GCL Nationals (Rk) | 6-2 | 200 | L-L | 1995-11-20 | 18 | Santiago,Dom Rep | A- | 2013-2015 | - | Free Agent | (MLB) | ||
| Will Rhymes | 2B | Syracuse (AAA) | 5-9 | 155 | L-R | 1983-04-01 | 31 | Houston,Texas | MLB | 2002-2014 | 2010-2012 | 2005-27- 810-DET | Col. William and Mary | Free Agent | (MLB) |
| Chris Riopedre | IF | Auburn (A-) | 5-9 | 175 | R-R | 1993-04-16 | 21 | Miami,Florida | A- | 2012-2017 | - | 2014-23- 694-WAS | East Tennessee St | Free Agent | (MLB) |
| Ryan Ripken | 1B | GCL Nationals (Rk) | 6-6 | 205 | L-L | 1993-07-26 | 20 | Baltimore,Maryland | A | 2014-2018 | - | 2014-15- 454-WAS | South Carolina, Indian River St | Minors | Baltimore Orioles (A-) |
| Tanner Roark | P | Washington (MLB) | 6-2 | 200 | R-R | 1986-10-05 | 27 | Wilmington,Illinois | MLB | 2006-2018 | 2013-2018 | 2008-25- 753-TEX | Illinois | Active | Washington Nationals (MLB) |
| Tyler Robertson | P | Syracuse (AAA) | 6-5 | 225 | L-L | 1987-12-23 | 26 | Simi Valley,California | MLB | 2006-2014 | 2012-2013 | 2006- 3- 96-MIN | Free Agent | (MLB) | |
| Victor Robles | OF | DSL Nationals (Rk) | 6-0 | 185 | R-R | 1997-05-19 | 17 | Santo Domingo,Dom Rep | MLB | 2014-2018 | 2017-2018 | 2013- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Jefry Rodriguez | P | Auburn (A-) Hagerstown (A) | 6-5 | 185 | R-R | 1993-07-26 | 20 | Haina,Dom Rep | MLB | 2012-2018 | 2018-2018 | Active | Cleveland Indians (MLB) | ||
| Manny Rodriguez | P | GCL Nationals (Rk) Auburn (A-) Hagerstown (A) Potomac (A+) | 6-3 | 205 | R-R | 1989-01-12 | 25 | Havana,Cuba | A+ | 2011-2015 | - | 2011-10- 307-WAS | Barry U. | Free Agent | (MLB) |
| Wilman Rodriguez | OF | Auburn (A-) Hagerstown (A) | 6-1 | 175 | R-R | 1991-06-07 | 23 | San Francisco de Macoris,Dom Rep | A | 2011-2015 | - | Free Agent | (MLB) | ||
| Josh Roenicke | P | Syracuse (AAA) | 6-3 | 195 | R-R | 1982-08-04 | 31 | Nevada City,Nevada | MLB | 2003-2017 | 2008-2013 | 2006-10- 294-CIN | UCLA | Free Agent | (MLB) |
| Dany Rojas | OF | DSL Nationals (Rk) | 5-9 | 160 | L-L | 1997-01-08 | 17 | New York,New York | RK | 2014-2014 | - | 2013- UDFA-WAS | (MLB) | ||
| Dionicio Rosario | OF | GCL Nationals (Rk) | 6-3 | 180 | R-R | 1994-02-14 | 20 | Moca,Dom Rep | RK | 2011-2015 | - | Free Agent | (MLB) | ||
| Ramses Rosario | P | DSL Nationals (Rk) | 6-3 | 180 | R-R | 1995-10-18 | 18 | La Victoria,Venezuela | RK | 2013-2016 | - | (MLB) | |||
| Danny Rosenbaum | P | Syracuse (AAA) | 6-1 | 205 | R-L | 1987-10-10 | 26 | Loveland,Ohio | AAA | 2007-2015 | - | 2009-22- 652-WAS | Indiana U., Xavier U. | Free Agent | (MLB) |
| Adderling Ruiz | C | Auburn (A-) | 6-1 | 175 | R-R | 1991-05-03 | 23 | Cambita Garabito,Dom Rep | AA | 2010-2018 | - | Free Agent | - (MLB) | ||
| Sam Runion | P | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-4 | 220 | R-R | 1988-11-09 | 25 | Asheville,North Carolina | AAA | 2007-2018 | - | 2007- 2- 66-KCA | Free Agent | (MLB) | |
| Melvi Salazar | P | GCL Nationals (Rk) | 6-1 | 175 | R-R | 1994-12-17 | 19 | Carupano,Venezuela | RK | 2012-2014 | - | Free Agent | (MLB) | ||
| Adrian Sanchez | SS-2B | Potomac (A+) Harrisburg (AA) | 6-0 | 160 | B-R | 1990-08-16 | 23 | Maracaibo,Venezuela | MLB | 2009-2018 | 2017-2018 | 2007- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Mario Sanchez | P | Auburn (A-) | 6-1 | 166 | R-R | 1994-10-31 | 19 | Maracaibo,Venezuela | AA | 2012-2018 | - | Free Agent | - (MLB) | ||
| Nate Schierholtz | RF | Syracuse (AAA) Washington (MLB) | 6-2 | 215 | L-R | 1984-02-15 | 30 | Reno,Nevada | MLB | 2003-2016 | 2007-2014 | 2003- 2- 63-SFN | Chabot Col | Restricted | (MLB) |
| Blake Schwartz | P | Potomac (A+) Harrisburg (AA) | 6-3 | 200 | R-R | 1989-10-09 | 24 | Rosemount,Minnesota | AA | 2012-2015 | - | 2012-17- 534-WAS | Oklahoma City U. | Retired | (MLB) |
| Derek Self | P | Potomac (A+) Harrisburg (AA) | 6-2 | 185 | R-R | 1990-01-14 | 24 | Cave City,Kentucky | AAA | 2009-2018 | - | 2012- 9- 294-WAS | Louisville | Minors | Washington Nationals (AA) |
| Brayan Serrata | C | GCL Nationals (Rk) | 6-3 | 175 | R-R | 1994-06-17 | 20 | Santo Domingo,Dom Rep | A- | 2012-2016 | - | Free Agent | (MLB) | ||
| Pedro Severino | C | Potomac (A+) | 6-1 | 180 | R-R | 1993-07-20 | 20 | Bonao,Dom Rep | MLB | 2011-2018 | 2015-2018 | 2010- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Isaias Silfa | P | DSL Nationals (Rk) | 6-0 | 180 | L-L | 1994-02-09 | 20 | San Pedro de Mac,Dom Rep | RK | 2014-2014 | - | (MLB) | |||
| Hector Silvestre | P | Hagerstown (A) Potomac (A+) | 6-3 | 180 | L-L | 1992-12-14 | 21 | San Pedro de Mac,Dom Rep | A+ | 2011-2018 | - | Free Agent | (MLB) | ||
| James Simmons | P | Harrisburg (AA) Syracuse (AAA) | 6-3 | 205 | R-R | 1986-09-29 | 27 | Yorba Linda,California | AAA | 2005-2016 | - | 2007- 1- 26-OAK | California-Riverside | Free Agent | (MLB) |
| Kyle Simmons | P | GCL Nationals (Rk) | 6-6 | 205 | R-R | 1991-09-25 | 22 | Las Vegas,Nevada | RK | 2014-2014 | - | 2014-24- 724-WAS | Texas Lutheran U. | Free Agent | (MLB) |
| John Simms | P | Hagerstown (A) Potomac (A+) Harrisburg (AA) | 6-3 | 195 | R-R | 1992-01-17 | 22 | The Woodlands,Texas | AAA | 2011-2018 | - | 2013-11- 346-WAS | Rice U. | Free Agent | - (MLB) |
| Brandon Sisk | P | GCL Nationals (Rk) | 6-3 | 210 | L-L | 1985-07-13 | 28 | Elkhart,Texas | AAA | 2004-2016 | - | Azusa Pacific U. | Free Agent | (MLB) | |
| Matt Skole | 1B | Harrisburg (AA) | 6-4 | 246 | L-R | 1989-07-30 | 24 | Woodstock,Georgia | MLB | 2009-2018 | 2018-2018 | 2011- 5- 157-WAS | Georgia Tech | Free Agent | - (MLB) |
| Jhonatan Solano | C | Syracuse (AAA) | 6-0 | 180 | R-R | 1985-08-12 | 28 | Barranquilla,Colombia | MLB | 2006-2017 | 2012-2015 | 2005- UDFA-WAS | Free Agent | (MLB) | |
| Sammy Solis | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) Harrisburg (AA) | 6-5 | 230 | R-L | 1988-08-10 | 25 | Litchfield Park,Arizona | MLB | 2008-2018 | 2015-2018 | 2010- 2- 51-WAS | San Diego | Active | Washington Nationals (MLB) |
| Rafael Soriano | P | Washington (MLB) | 6-1 | 175 | R-R | 1979-12-19 | 34 | San Jose,Dom Rep | MLB | 1997-2015 | 2002-2015 | 1996- UDFA-SEA | Retired | (MLB) | |
| Steven Souza | OF | Hagerstown (A) Potomac (A+) Syracuse (AAA) Washington (MLB) | 6-4 | 195 | R-R | 1989-04-24 | 25 | Seattle,Washington | MLB | 2007-2018 | 2014-2018 | 2007- 3- 100-WAS | Active | Arizona Diamondbacks (MLB) | |
| Denard Span | CF | Hagerstown (A) Washington (MLB) | 6-1 | 180 | L-L | 1984-02-27 | 30 | Tampa,Florida | MLB | 2003-2018 | 2008-2018 | 2002- 1- 20-MIN | Free Agent | (MLB) | |
| Matthew Spann | P | Hagerstown (A) Potomac (A+) | 6-7 | 185 | L-L | 1991-02-17 | 23 | Columbia,Tennessee | AAA | 2010-2016 | - | 2010-25- 761-TBA | Free Agent | (MLB) | |
| Craig Stammen | P | Washington (MLB) | 6-3 | 200 | R-R | 1984-03-09 | 30 | Coldwater,Ohio | MLB | 2003-2018 | 2009-2018 | 2005-12- 354-WAS | Dayton | Active | San Diego Padres (MLB) |
| Daniel Stange | P | Syracuse (AAA) | 6-3 | 185 | R-R | 1985-12-22 | 28 | Riverside,California | MLB | 2004-2014 | 2010-2013 | 2006- 7- 207-ARI | California-Riverside | Free Agent | (MLB) |
| Drew Storen | P | Washington (MLB) | 6-2 | 180 | B-R | 1987-08-11 | 26 | Indianapolis,Indiana | MLB | 2008-2017 | 2010-2017 | 2009- 1- 10-WAS | Stanford U. | Free Agent | (MLB) |
| Stephen Strasburg | P | Washington (MLB) | 6-4 | 220 | R-R | 1988-07-20 | 25 | San Diego,California | MLB | 2007-2018 | 2010-2018 | 2009- 1- 1-WAS | San Diego St | Active | Washington Nationals (MLB) |
| Wander Suero | P | Hagerstown (A) Potomac (A+) | 6-3 | 175 | R-R | 1991-09-15 | 22 | Sabana Larga,Dom Rep | MLB | 2010-2018 | 2018-2018 | Active | Washington Nationals (MLB) | ||
| Matt Swynenberg | P | Auburn (A-) Hagerstown (A) Potomac (A+) | 6-5 | 195 | R-R | 1989-02-16 | 25 | Davenport,Iowa | AAA | 2008-2015 | - | 2009-28- 832-WAS | Black Hawk Col | Restricted | Washington Nationals (AAA) |
| Mike Sylvestri | P | Hagerstown (A) | 5-11 | 170 | R-R | 1990-06-14 | 24 | Coconut Creek,Florida | A | 2010-2014 | - | 2013-29- 886-WAS | Florida Gulf Coast U., St. Petersburg Col, Florida Atl U. | Minors | Washington Nationals (MLB) |
| Ryan Tatusko | P | Syracuse (AAA) | 6-5 | 200 | R-R | 1985-03-27 | 29 | Merrillville,Indiana | AAA | 2005-2014 | - | 2007-18- 560-TEX | Indiana St | Free Agent | (MLB) |
| Michael Taylor | OF | Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-2 | 190 | R-R | 1991-03-26 | 23 | Fort Lauderdale,Florida | MLB | 2010-2018 | 2014-2018 | 2009- 6- 172-WAS | Active | Washington Nationals (MLB) | |
| Oscar Tejeda | 2B-3B | Potomac (A+) Harrisburg (AA) | 6-1 | 177 | R-R | 1989-12-26 | 24 | Sabana Grande de Palenque,Dom Rep | AAA | 2007-2015 | - | Free Agent | (MLB) | ||
| Justin Thomas | P | Hagerstown (A) | 6-2 | 195 | L-L | 1990-10-21 | 23 | White Oak,Texas | A+ | 2010-2016 | - | 2013-21- 646-WAS | So.Arkansas U., Navarro Col | Minors | Washington Nationals (MLB) |
| Matt Thornton | P | Washington (MLB) | 6-6 | 220 | L-L | 1976-09-15 | 37 | Three Rivers,Michigan | MLB | 1996-2016 | 2004-2016 | 1998- 1- 22-SEA | Grand Valley St | Retired | (MLB) |
| Jorge Tillero | C | GCL Nationals (Rk) | 5-11 | 160 | R-R | 1993-12-21 | 20 | Maturin,Venezuela | A | 2011-2017 | - | Restricted | Washington Nationals (A) | ||
| Luis Torres | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 190 | R-R | 1994-06-04 | 20 | Barquisimeto,Venezuela | A | 2013-2016 | - | Free Agent | (MLB) | ||
| Blake Treinen | P | Syracuse (AAA) Washington (MLB) | 6-4 | 200 | R-R | 1988-06-30 | 26 | Osage City,Kansas | MLB | 2010-2018 | 2014-2018 | 2011- 7- 226-OAK | South Dakota St, Arkansas, Baker U. | Active | Oakland Athletics (MLB) |
| Edward Trejos | C | DSL Nationals (Rk) | 5-11 | 170 | R-R | 1997-03-12 | 17 | Panama City,Panama | RK | 2014-2015 | - | Free Agent | (MLB) | ||
| Kylin Turnbull | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) | 6-5 | 185 | R-L | 1989-09-12 | 24 | Hillsboro,Oregon | A+ | 2012-2018 | - | 2011- 4- 127-WAS | Santa Barbara City Col | Minors | Washington Nationals (A+) |
| Ryan Ullmann | P | Hagerstown (A) Potomac (A+) | 6-6 | 230 | R-R | 1991-08-12 | 22 | Bryan,Texas | A+ | 2010-2015 | - | 2013-30- 916-WAS | Concordia U. | Free Agent | (MLB) |
| Jean Carlos Valdez | 3B-1B | Auburn (A-) | 6-2 | 190 | R-R | 1993-03-14 | 21 | Bani,Dom Rep | A+ | 2010-2014 | - | Free Agent | (MLB) | ||
| Phillips Valdez | P | Auburn (A-) Hagerstown (A) | 6-2 | 160 | R-R | 1991-11-16 | 22 | San Pedro de Mac,Dom Rep | AAA | 2010-2018 | - | Free Agent | - (MLB) | ||
| Maximo Valerio | P | GCL Nationals (Rk) | 6-2 | 175 | R-R | 1995-07-22 | 18 | Santo Domingo,Dom Rep | A- | 2012-2016 | - | Free Agent | (MLB) | ||
| Drew Van Orden | P | GCL Nationals (Rk) Auburn (A-) | 6-4 | 200 | R-R | 1992-01-19 | 22 | Manhattan Beach,California | A | 2011-2015 | - | 2014- 5- 154-WAS | Duke U. | Free Agent | (MLB) |
| Miguel Vargas | P | DSL Nationals (Rk) | 6-4 | 190 | R-R | 1995-03-05 | 19 | Caracas,Venezuela | RK | 2014-2014 | - | (MLB) | |||
| Daury Vasquez | P | GCL Nationals (Rk) | 6-4 | 170 | R-R | 1992-11-21 | 21 | Santiago,Dom Rep | RK | 2011-2014 | - | Free Agent | (MLB) | ||
| Felipe Vazquez | P | GCL Nationals (Rk) Hagerstown (A) Harrisburg (AA) | 6-0 | 151 | L-L | 1991-07-05 | 22 | San Felipe,Venezuela | MLB | 2011-2018 | 2015-2018 | 2008- UDFA-TBA | Active | Pittsburgh Pirates (MLB) | |
| Drew Vettleson | OF | Auburn (A-) Harrisburg (AA) | 6-0 | 185 | L-B | 1991-07-19 | 22 | Tracyton,Washington | AA | 2011-2017 | - | 2010- 1- 42-TBA | Free Agent | (MLB) | |
| Luis Vilorio | C | DSL Nationals (Rk) | 6-1 | 180 | R-R | 1993-08-28 | 20 | San Pedro de Mac,Dom Rep | A- | 2013-2018 | - | Free Agent | (MLB) | ||
| Austin Voth | P | Hagerstown (A) Potomac (A+) Harrisburg (AA) | 6-1 | 189 | R-R | 1992-06-26 | 22 | Redmond,Washington | MLB | 2011-2018 | 2018-2018 | 2013- 5- 166-WAS | Washington | Active | Washington Nationals (MLB) |
| Jake Walsh | P | Hagerstown (A) Potomac (A+) | 6-3 | 189 | L-L | 1991-01-01 | 23 | San Francisco,California | A+ | 2012-2015 | - | 2013-34-1036-WAS | Missouri | Free Agent | (MLB) |
| Zach Walters | SS | Syracuse (AAA) Washington (MLB) | 6-3 | 195 | L-R | 1989-09-05 | 24 | Cheyenne,Wyoming | MLB | 2008-2018 | 2013-2016 | 2010- 9- 271-ARI | San Diego | Free Agent | (MLB) |
| Drew Ward | 3B | Hagerstown (A) | 6-3 | 215 | L-R | 1994-11-25 | 19 | Leedey,Oklahoma | AAA | 2013-2018 | - | 2013- 3- 105-WAS | Minors | Washington Nationals (AA) | |
| Joey Webb | P | Auburn (A-) Hagerstown (A) | 6-5 | 230 | L-L | 1990-09-27 | 23 | Reno,Nevada | A | 2009-2017 | - | 2013-28- 856-WAS | Menlo Col, Feather River Col | Free Agent | (MLB) |
| Jayson Werth | RF | Washington (MLB) | 6-5 | 210 | R-R | 1979-05-20 | 35 | Springfield,Illinois | MLB | 1997-2018 | 2002-2017 | 1997- 1- 22-BAL | Retired | - (MLB) | |
| Austen Williams | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 210 | R-R | 1992-12-19 | 21 | Fort Worth,Texas | MLB | 2012-2018 | 2018-2018 | 2014- 6- 184-WAS | Texas St | Active | Washington Nationals (MLB) |
| Deion Williams | P | Auburn (A-) | 6-3 | 208 | R-R | 1992-11-11 | 21 | Stone Mountain,Georgia | A | 2011-2015 | - | 2011-16- 487-WAS | Free Agent | (MLB) | |
| Clay Williamson | OF | Auburn (A-) | 6-1 | 190 | L-R | 1993-06-01 | 21 | Irvine,California | A- | 2012-2015 | - | 2014-19- 574-WAS | Cal St Fullerton | Free Agent | (MLB) |
| John Wooten | RF-OF | Auburn (A-) Hagerstown (A) Potomac (A+) | 6-4 | 190 | R-R | 1991-01-19 | 23 | Goldsboro,North Carolina | A+ | 2010-2015 | - | 2012-37-1129-OAK | East Carolina U. | Minors | Washington Nationals (MLB) |
| Jimmy Yezzo | 1B | Hagerstown (A) | 6-0 | 200 | L-R | 1992-02-27 | 22 | Cherry Hill,New Jersey | A+ | 2011-2016 | - | 2013- 7- 226-WAS | Delaware | Free Agent | (MLB) |
| Deibi Yrizarri | P | GCL Nationals (Rk) Auburn (A-) | 6-1 | 170 | R-R | 1994-10-03 | 19 | Puerto Ordaz,Venezuela | A- | 2013-2015 | - | Free Agent | (MLB) | ||
| Greg Zebrack | OF | Auburn (A-) Hagerstown (A) | 6-1 | 190 | R-R | 1990-08-28 | 23 | Northridge,California | A | 2009-2014 | - | 2008-43-1297-LAN | USC, Pennsylvania | Free Agent | (MLB) |
| Ryan Zimmerman | 3B | Potomac (A+) Washington (MLB) | 6-2 | 210 | R-R | 1984-09-28 | 29 | Washington,North Carolina | MLB | 2003-2018 | 2005-2018 | 2005- 1- 4-WAS | Virginia | Active | Washington Nationals (MLB) |
