| 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 | 98 | 64 | .605 | -- | 1 | 731 | 594 | +137 | Davey Johnson | Nationals Park |
| Syracuse Chiefs | Stats -- Roster | International League | AAA | 134 | 70 | 74 | .486 | 14.0 | 5 | 632 | 611 | +21 | Tony Beasley | Alliance Bank Stadium |
| Harrisburg Senators | Stats -- Roster | Eastern League | AA | 128 | 64 | 78 | .451 | 18.5 | 5 | 554 | 645 | -91 | Matt LeCroy | Metro Bank Park |
| Potomac Nationals | Stats -- Roster | Carolina League | A+ | 128 | 64 | 75 | .460 | 7.5 | 3 | 590 | 700 | -110 | Brian Rupp | G. Richard Pfitzner Stadium |
| Hagerstown Suns | Stats -- Roster | South Atlantic League | A | 146 | 82 | 58 | .586 | -- | 1 | 766 | 687 | +79 | Brian Daubach | Municipal Stadium |
| Auburn Doubledays | Stats -- Roster | New York-Penn League | A- | 110 | 46 | 30 | .605 | -- | 1 | 432 | 378 | +54 | Gary Cathcart | Falcon Park II |
| Gulf Coast Nationals | Stats -- Roster | Gulf Coast League | Rk | 91 | 27 | 33 | .450 | 8.0 | 4 | 223 | 243 | -20 | Tripp Keister | Space Coast Stadium |
| Dominican Nationals | Stats -- Roster | Dominican Summer League | Rk | 102 | 38 | 32 | .543 | 11.0 | 3 | 383 | 380 | +3 | ||
| Organizational Totals: | 933 | 489 | 444 | .524 | 6 | 4311 | 4238 | +73 | ||||||
2012 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 | DSL Nationals (Rk) | 6-0 | 170 | R-R | 1994-06-13 | 18 | La Romana,Dom Rep | AA | 2012-2018 | - | Minors | Washington Nationals (AA) | ||
| Miguel Acevedo | P | DSL Nationals (Rk) | 6-2 | 180 | R-R | 1994-03-07 | 18 | Santo Domingo,Dom Rep | RK | 2012-2012 | - | (MLB) | |||
| Younaifred Aguero | 3B | DSL Nationals (Rk) | 6-2 | 170 | R-R | 1993-04-10 | 19 | Barquisimeto,Venezuela | RK | 2012-2015 | - | Free Agent | (MLB) | ||
| Mike Albaladejo | C | GCL Nationals (Rk) | 5-7 | 162 | R-R | 1990-02-26 | 22 | Bridgeport,Connecticut | RK | 2009-2014 | - | Florida Atl U. | Free Agent | (MLB) | |
| Carlos Alvarez | 3B | Auburn (A-) Hagerstown (A) | 5-11 | 175 | B-R | 1985-11-25 | 26 | San Cristobal,Dom Rep | A | 2011-2013 | - | Free Agent | (MLB) | ||
| Thomas Alvarez | 2B | DSL Nationals (Rk) | 6-1 | 165 | R-R | 1995-02-15 | 17 | Camden,New Jersey | RK | 2012-2015 | - | Free Agent | (MLB) | ||
| Dixon Anderson | P | GCL Nationals (Rk) Hagerstown (A) | 6-5 | 225 | R-R | 1989-07-02 | 22 | Berkeley,California | A | 2009-2014 | - | 2011- 9- 277-WAS | California | Retired | (MLB) |
| Rick Ankiel | RF-CF | Hagerstown (A) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-1 | 210 | L-L | 1979-07-19 | 32 | Fort Pierce,Florida | MLB | 1998-2013 | 1999-2013 | 1997- 2- 72-SLN | Retired | (MLB) | |
| Paul Applebee | P | Potomac (A+) | 6-3 | 185 | L-L | 1988-05-17 | 24 | Upland,California | A+ | 2007-2012 | - | 2009-10- 292-WAS | California-Riverside | Minors | Washington Nationals (MLB) |
| Jonathan Aquino | P | DSL Nationals (Rk) | 6-1 | 185 | R-R | 1995-03-28 | 17 | Santo Domingo,Dom Rep | RK | 2012-2013 | - | (MLB) | |||
| Erik Arnesen | P | Syracuse (AAA) | 6-3 | 240 | R-R | 1984-03-19 | 28 | Franklin,New Jersey | AAA | 2003-2014 | - | 2006-17- 511-WAS | Grove City Col | Minors | Oakland Athletics (MLB) |
| Miguel Atencio | OF | DSL Nationals (Rk) | 6-0 | 165 | R-R | 1995-05-03 | 17 | Veraguas,Panama | RK | 2012-2013 | - | (MLB) | |||
| Mitch Atkins | P | Syracuse (AAA) | 6-3 | 210 | R-R | 1985-10-01 | 26 | Greensboro,North Carolina | MLB | 2004-2018 | 2009-2011 | 2004- 7- 216-CHN | Free Agent | (MLB) | |
| Gregory Baez | P | Auburn (A-) | 6-3 | 185 | L-L | 1992-05-05 | 20 | Santo Domingo,Dom Rep | A- | 2010-2012 | - | Free Agent | (MLB) | ||
| Hunter Bailey | 3B-2B | GCL Nationals (Rk) | 6-0 | 186 | R-R | 1989-05-17 | 23 | Cedar Park,Texas | A | 2009-2013 | - | 2012-28- 864-WAS | Oklahoma St, McLennan CC | Free Agent | (MLB) |
| Mike Ballard | P | Harrisburg (AA) | 6-2 | 185 | L-L | 1984-02-06 | 28 | Virginia Beach,Virginia | AAA | 2003-2013 | - | 2006-14- 418-TEX | Virginia | Free Agent | - (MLB) |
| Aaron Barrett | P | Hagerstown (A) Potomac (A+) | 6-4 | 200 | R-R | 1988-01-02 | 24 | Evansville,Indiana | MLB | 2007-2018 | 2014-2015 | 2010- 9- 266-WAS | Mississippi, Wabash Valley Col | Minors | Washington Nationals (A-) |
| Joel Barrientos | P | GCL Nationals (Rk) | 6-2 | 145 | L-L | 1993-08-16 | 18 | Monte Cristi,Dom Rep | A- | 2011-2013 | - | Free Agent | (MLB) | ||
| Jimmy Barthmaier | P | Potomac (A+) Harrisburg (AA) | 6-4 | 200 | R-R | 1984-01-06 | 28 | Roswell,Georgia | MLB | 2003-2012 | 2008-2008 | 2003-13- 389-HOU | Free Agent | - (MLB) | |
| Colin Bates | P | Hagerstown (A) | 6-1 | 179 | R-R | 1988-03-10 | 24 | LaGrange,Illinois | AA | 2008-2015 | - | 2010-23- 686-WAS | North Carolina | Minors | Washington Nationals (MLB) |
| Rafael Bautista | OF | DSL Nationals (Rk) | 6-2 | 165 | R-R | 1993-03-08 | 19 | Santo Domingo,Dom Rep | MLB | 2012-2018 | 2017-2018 | 2012- UDFA-WAS | Houston Astros (AAA) | ||
| Robert Benincasa | P | Auburn (A-) | 6-2 | 180 | R-R | 1990-09-05 | 21 | Tampa,Florida | AA | 2010-2016 | - | 2012- 7- 234-WAS | Florida St | Minors | Washington Nationals (MLB) |
| Juan Benitez | P | DSL Nationals (Rk) | 6-6 | 180 | R-R | 1991-12-16 | 20 | Santo Domingo,Dom Rep | RK | 2012-2018 | - | Minors | Miami Marlins (MLB) | ||
| Roger Bernadina | RF-LF | Washington (MLB) | 6-0 | 170 | L-L | 1984-06-12 | 28 | Willemstad,Curacao | MLB | 2002-2016 | 2008-2014 | 2001- UDFA-MON | Free Agent | (MLB) | |
| Jorge Berrio | P | DSL Nationals (Rk) | 6-0 | 145 | R-R | 1995-02-08 | 17 | Cartagena,Colombia | RK | 2012-2012 | - | (MLB) | |||
| Austin Bibens-Dirkx | P | Harrisburg (AA) Syracuse (AAA) | 6-2 | 190 | R-R | 1985-04-29 | 27 | Salem,Oregon | MLB | 2004-2018 | 2017-2018 | 2006-16- 471-SEA | Portland, Chemeketa CC | Active | Texas Rangers (MLB) |
| Justin Bloxom | 1B | Potomac (A+) Harrisburg (AA) | 6-1 | 196 | B-R | 1988-04-29 | 24 | Farmington,New Mexico | AA | 2007-2014 | - | 2009-11- 322-WAS | Kansas St | Free Agent | (MLB) |
| Michael Boyden | P | GCL Nationals (Rk) Auburn (A-) | 6-1 | 175 | R-R | 1990-06-18 | 22 | La Plata,Maryland | A- | 2009-2013 | - | 2012-31- 954-WAS | George Washington U., Maryland, NWShoals CC | Free Agent | (MLB) |
| Brian Broderick | P | Harrisburg (AA) | 6-6 | 205 | R-R | 1986-09-01 | 25 | Phoenix,Arizona | MLB | 2006-2015 | 2011-2011 | 2007-21- 652-SLN | Grand Canyon U., Mesa CC | Free Agent | (MLB) |
| James Brooks | 3B-SS | GCL Nationals (Rk) Auburn (A-) | 6-0 | 185 | R-R | 1988-10-12 | 23 | Melbourne,Australia | A- | 2009-2012 | - | 2012-20- 624-WAS | Utah, Cochise Col | Free Agent | (MLB) |
| Corey Brown | OF | Syracuse (AAA) Washington (MLB) | 6-2 | 210 | L-L | 1985-11-26 | 26 | Tampa,Florida | MLB | 2005-2017 | 2011-2014 | 2007- 1- 59-OAK | Oklahoma St | Free Agent | (MLB) |
| Sean Burnett | P | Washington (MLB) | 6-1 | 176 | L-L | 1982-09-17 | 29 | Dunedin,Florida | MLB | 2000-2018 | 2004-2016 | 2000- 1- 19-PIT | Free Agent | - (MLB) | |
| Billy Burns | OF | Hagerstown (A) | 5-9 | 165 | R-R | 1989-08-30 | 22 | Marietta,Georgia | MLB | 2009-2018 | 2014-2017 | 2011-32- 967-WAS | Mercer U. | Minors | Kansas City Royals (AAA) |
| Seth Bynum | SS | Harrisburg (AA) Syracuse (AAA) | 6-0 | 180 | R-R | 1980-12-19 | 31 | Louisville,Kentucky | AAA | 2003-2012 | - | 2003-38-1137-MON | Indiana U., Lincoln Trail Col | Free Agent | - (MLB) |
| Adam Carr | P | GCL Nationals (Rk) Potomac (A+) | 6-2 | 210 | R-R | 1984-04-01 | 28 | Felton,California | AAA | 2003-2013 | - | 2006-18- 541-WAS | Oklahoma St, West Valley Col | Free Agent | - (MLB) |
| Brett Carroll | OF | Syracuse (AAA) Washington (MLB) | 6-0 | 190 | R-R | 1982-10-03 | 29 | Knoxville,Tennessee | MLB | 2002-2014 | 2007-2012 | 2004-10- 308-FLO | Middle Tennessee St | Free Agent | (MLB) |
| Kevin Cerda | 1B | DSL Nationals (Rk) | 6-0 | 190 | R-R | 1993-06-11 | 19 | New York,New York | RK | 2012-2013 | - | (MLB) | |||
| Jose Chavez | P | DSL Nationals (Rk) | 6-3 | 165 | R-R | 1991-12-01 | 20 | Jima Abajo,Dom Rep | RK | 2012-2012 | - | (MLB) | |||
| Austin Chubb | C | GCL Nationals (Rk) | 6-2 | 220 | R-R | 1989-04-17 | 23 | 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 | 27 | Lexington,Kentucky | MLB | 2003-2018 | 2007-2018 | 2003- 9- 274-NYA | Active | Toronto Blue Jays (MLB) | |
| Chris Curran | LF | Hagerstown (A) Potomac (A+) | 5-9 | 170 | L-R | 1987-12-21 | 24 | Plymouth,New Hampshire | AAA | 2007-2013 | - | 2008-22- 661-WAS | Miami-Dade Col | (MLB) | |
| Cody Davis | P | Auburn (A-) | 5-9 | 170 | R-R | 1990-07-21 | 21 | Loxahatchee,Florida | A+ | 2010-2015 | - | Tampa, Hillsborough CC | Free Agent | (MLB) | |
| Erik Davis | P | Harrisburg (AA) Syracuse (AAA) | 6-4 | 200 | R-R | 1986-10-08 | 25 | San Jose,California | MLB | 2005-2018 | 2013-2013 | 2008-13- 405-SDN | Stanford U. | Minors | Milwaukee Brewers (AAA) |
| Emmanuel De La Cruz | P | DSL Nationals (Rk) | 6-4 | 180 | R-R | 1992-04-16 | 20 | Cotui,Dom Rep | RK | 2011-2012 | - | (MLB) | |||
| Jesus De Los Santos | P | DSL Nationals (Rk) | 6-4 | 190 | R-R | 1992-11-28 | 19 | San Pedro de Mac,Dom Rep | RK | 2011-2012 | - | (MLB) | |||
| Juan De Los Santos | 1B | DSL Nationals (Rk) | 5-11 | 170 | R-R | 1994-01-11 | 18 | Maracaibo,Venezuela | RK | 2011-2014 | - | (MLB) | |||
| Ryan Demmin | P | Potomac (A+) | 6-1 | 210 | L-L | 1988-04-05 | 24 | Oshkosh,Wisconsin | AA | 2007-2014 | - | Minnesota St-Mankato, Wisconsin-Oshkosh | Retired | (MLB) | |
| Paul Demny | P | Harrisburg (AA) | 6-3 | 220 | R-R | 1989-08-03 | 22 | Houston,Texas | AAA | 2008-2016 | - | 2008- 6- 181-WAS | Blinn Col | Free Agent | (MLB) |
| Mark DeRosa | 2B-3B | Potomac (A+) Washington (MLB) | 6-1 | 190 | R-R | 1975-02-02 | 37 | Passaic,New Jersey | MLB | 1994-2013 | 1998-2013 | 1996- 7- 212-ATL | Pennsylvania | Retired | (MLB) |
| Ian Desmond | SS | Washington (MLB) | 6-2 | 185 | R-R | 1985-09-20 | 26 | 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 | 26 | St. Louis,Missouri | MLB | 2005-2018 | 2007-2018 | 2007- 1- 6-WAS | Missouri St | Free Agent | - (MLB) |
| Kevin Dicharry | P | GCL Nationals (Rk) | 6-4 | 195 | R-R | 1989-11-27 | 22 | Houston,Texas | A- | 2009-2013 | - | 2012-24- 744-WAS | Texas | Free Agent | (MLB) |
| Wilmer Difo | SS-2B | GCL Nationals (Rk) | 6-0 | 175 | R-R | 1992-04-02 | 20 | Santiago de los Caballeros,Dom Rep | MLB | 2010-2018 | 2015-2018 | 2011- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Angelo Dilone | P | DSL Nationals (Rk) | 6-5 | 188 | R-R | 1992-12-15 | 19 | New York,New York | RK | 2012-2012 | - | (MLB) | |||
| Zach Duke | P | Syracuse (AAA) Washington (MLB) | 6-2 | 210 | L-L | 1983-04-19 | 29 | Clifton,Texas | MLB | 2002-2018 | 2005-2018 | 2001-20- 594-PIT | Active | Seattle Mariners (MLB) | |
| Brian Dupra | P | Hagerstown (A) | 6-3 | 198 | R-R | 1988-12-15 | 23 | Rochester,New York | AAA | 2008-2017 | - | 2011- 7- 217-WAS | Notre Dame | Free Agent | (MLB) |
| Cutter Dykstra | 3B-2B | Hagerstown (A) | 5-11 | 180 | R-R | 1989-06-29 | 23 | Thousand Oaks,California | AAA | 2008-2016 | - | 2008- 2- 54-MIL | Free Agent | (MLB) | |
| Armando Echenique | OF | DSL Nationals (Rk) | 6-0 | 180 | R-R | 1995-01-07 | 17 | Caucagua,Venezuela | RK | 2012-2012 | - | (MLB) | |||
| Pedro Encarnacion | P | Auburn (A-) Hagerstown (A) | 6-4 | 175 | R-R | 1991-06-26 | 21 | Nizao,Dom Rep | A+ | 2010-2014 | - | Free Agent | (MLB) | ||
| Randy Encarnacion | OF | DSL Nationals (Rk) | 6-3 | 180 | R-R | 1994-07-31 | 17 | Batey Santana De Uvilla,Dom Rep | A | 2011-2017 | - | Free Agent | (MLB) | ||
| Danny Espinosa | 2B | Washington (MLB) | 6-0 | 190 | B-R | 1987-04-25 | 25 | 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 | 20 | Santo Domingo,Dom Rep | AA | 2010-2018 | - | Free Agent | - (MLB) | ||
| Diomedes Eusebio | 1B | GCL Nationals (Rk) | 6-0 | 185 | R-R | 1992-09-08 | 19 | San Pedro de Mac,Dom Rep | A | 2011-2017 | - | Free Agent | (MLB) | ||
| Wilson Eusebio | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) | 6-0 | 170 | R-R | 1988-08-20 | 23 | Puerto Plata,Dom Rep | A+ | 2009-2012 | - | Free Agent | - (MLB) | ||
| Erick Fernandez | C | Potomac (A+) | 6-0 | 193 | R-R | 1988-11-30 | 23 | Hialeah,Florida | A+ | 2008-2013 | - | 2011-25- 757-WAS | Georgetown U. | Minors | Pittsburgh Pirates (MLB) |
| David Fischer | P | Auburn (A-) | 6-5 | 175 | R-R | 1990-04-10 | 22 | Scotia,New York | A+ | 2009-2017 | - | 2012-18- 564-WAS | Connecticut | Free Agent | (MLB) |
| Jesus Flores | C | Washington (MLB) | 6-1 | 180 | R-R | 1984-10-26 | 27 | Carupano,Venezuela | MLB | 2004-2015 | 2007-2012 | 2002- UDFA-NYN | Free Agent | (MLB) | |
| Matt Foat | 2B | GCL Nationals (Rk) | 6-0 | 185 | R-R | 1990-03-20 | 22 | Rescue,California | A | 2009-2013 | - | USC, Sierra Col | Free Agent | (MLB) | |
| David Freitas | C | Potomac (A+) | 6-3 | 225 | R-R | 1989-03-18 | 23 | Sacramento,California | MLB | 2008-2018 | 2017-2018 | 2010-15- 446-WAS | Hawaii, Cosumnes River Col | Active | Seattle Mariners (MLB) |
| Marcos Frias | P | Harrisburg (AA) | 6-2 | 190 | R-R | 1988-12-19 | 23 | Los Llanos,Dom Rep | AA | 2008-2013 | - | Free Agent | (MLB) | ||
| Christian Garcia | P | Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-4 | 175 | R-R | 1985-08-24 | 26 | Miami,Florida | MLB | 2004-2014 | 2012-2012 | 2004- 3- 99-NYA | Free Agent | (MLB) | |
| Rob Gilliam | P | Potomac (A+) Harrisburg (AA) | 6-1 | 195 | R-R | 1987-11-29 | 24 | Manassas,Virginia | AA | 2007-2014 | - | 2009- 8- 243-OAK | UNC Greensboro | Free Agent | (MLB) |
| Lucas Giolito | P | GCL Nationals (Rk) | 6-6 | 230 | R-R | 1994-07-14 | 17 | Santa Monica,California | MLB | 2012-2018 | 2016-2018 | 2012- 1- 16-WAS | Active | Chicago White Sox (MLB) | |
| Elisaul Gomez | P | DSL Nationals (Rk) | 6-1 | 165 | L-L | 1992-03-26 | 20 | Azua,Dom Rep | RK | 2012-2012 | - | Free Agent | (MLB) | ||
| Gio Gonzalez | P | Washington (MLB) | 5-11 | 185 | R-L | 1985-09-19 | 26 | Hialeah,Florida | MLB | 2004-2018 | 2008-2018 | 2004- 1- 38-CHA | DL-10 | Milwaukee Brewers (MLB) | |
| Mike Gonzalez | P | Syracuse (AAA) Washington (MLB) | 6-2 | 213 | R-L | 1978-05-23 | 34 | Corpus Christi,Texas | MLB | 1997-2016 | 2003-2013 | 1997-30- 902-PIT | San Jacinto Col | Free Agent | - (MLB) |
| Brian Goodwin | OF | Hagerstown (A) Harrisburg (AA) | 6-0 | 190 | L-R | 1990-11-02 | 21 | Rocky Mount,North Carolina | MLB | 2010-2018 | 2016-2018 | 2011- 1- 34-WAS | North Carolina, Miami-Dade Col | DL-10 | Kansas City Royals (AAA) |
| Tom Gorzelanny | P | Washington (MLB) | 6-3 | 200 | B-L | 1982-07-12 | 29 | Evergreen Park,Illinois | MLB | 2002-2017 | 2005-2016 | 2003- 2- 45-PIT | Triton Col, Kansas | Free Agent | (MLB) |
| Matt Grace | P | Potomac (A+) | 6-4 | 205 | L-L | 1988-12-14 | 23 | Torrance,California | MLB | 2008-2018 | 2015-2018 | 2010- 8- 236-WAS | UCLA | Active | Washington Nationals (MLB) |
| Brent Greer | 3B | Potomac (A+) | 6-0 | 185 | R-R | 1987-10-16 | 24 | Abingdon,Virginia | A+ | 2007-2012 | - | 2009-14- 426-ARI | Western Carolina U. | Free Agent | - (MLB) |
| Rick Hague | 2B | Potomac (A+) | 6-2 | 185 | R-R | 1988-09-18 | 23 | Spring,Texas | AAA | 2008-2016 | - | 2010- 3- 83-WAS | Rice U. | Free Agent | (MLB) |
| Bobby Hansen | P | Hagerstown (A) Potomac (A+) | 6-5 | 220 | L-L | 1989-12-17 | 22 | Monument,Colorado | A+ | 2008-2012 | - | 2008-18- 541-WAS | Free Agent | (MLB) | |
| Bryan Harper | P | Auburn (A-) | 6-4 | 180 | L-L | 1989-12-29 | 22 | Las Vegas,Nevada | AAA | 2009-2018 | - | 2011-30- 907-WAS | Cal St Northridge, Col. So.Nevada, South Carolina | Minors | Washington Nationals (AA) |
| Bryce Harper | LF | Syracuse (AAA) Washington (MLB) | 6-3 | 205 | L-R | 1992-10-16 | 19 | Las Vegas,Nevada | MLB | 2010-2018 | 2012-2018 | 2010- 1- 1-WAS | Col. So.Nevada | Active | Washington Nationals (MLB) |
| Ben Hawkins | P | Hagerstown (A) | 6-2 | 175 | L-L | 1989-11-04 | 22 | Rome,Georgia | A+ | 2010-2013 | - | 2011-36-1087-WAS | West Florida, Wallace St CC | Free Agent | (MLB) |
| Travis Henke | P | Auburn (A-) Hagerstown (A) | 6-6 | 241 | R-R | 1988-07-09 | 23 | Jefferson City,Missouri | A+ | 2008-2014 | - | 2011-22- 667-WAS | Arkansas-Little Rock, Jefferson Col | Free Agent | (MLB) |
| Inocencio Heredia | P | GCL Nationals (Rk) | 5-11 | 172 | R-R | 1991-12-11 | 20 | Duverge,Dom Rep | RK | 2010-2013 | - | Free Agent | (MLB) | ||
| Graham Hicks | P | GCL Nationals (Rk) | 6-5 | 170 | L-L | 1990-02-09 | 22 | Lakeland,Florida | A | 2008-2012 | - | 2008- 4- 121-WAS | Free Agent | (MLB) | |
| J.R. Higley | OF | Auburn (A-) Hagerstown (A) Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-2 | 180 | R-R | 1988-06-21 | 24 | Woodland,California | AAA | 2008-2014 | - | 2008- 9- 271-WAS | Sacramento City Col, Loyola Marymount U. | Free Agent | (MLB) |
| Koyie Hill | C | Syracuse (AAA) | 6-0 | 190 | B-R | 1979-03-09 | 33 | Tulsa,Oklahoma | MLB | 1998-2014 | 2003-2014 | 2000- 4- 117-LAN | Wichita St | Free Agent | (MLB) |
| Taylor Hill | P | Hagerstown (A) Potomac (A+) | 6-3 | 200 | R-R | 1989-03-12 | 23 | Mount Juliet,Tennessee | MLB | 2008-2018 | 2014-2015 | 2011- 6- 187-WAS | Vanderbilt U. | Minors | San Francisco Giants (AAA) |
| Jarrett Hoffpauir | 2B-3B | Syracuse (AAA) | 5-9 | 165 | R-R | 1983-06-18 | 29 | Natchez,Mississippi | MLB | 2002-2012 | 2009-2010 | 2004- 6- 180-SLN | So.Mississippi | Minors | Toronto Blue Jays (MLB) |
| Trevor Holder | P | Potomac (A+) Harrisburg (AA) | 6-2 | 185 | R-R | 1987-01-08 | 25 | Birmingham,Alabama | AA | 2006-2013 | - | 2009- 3- 81-WAS | Georgia | Free Agent | (MLB) |
| Neil Holland | P | Potomac (A+) Syracuse (AAA) | 5-11 | 180 | R-R | 1988-08-14 | 23 | Owensboro,Kentucky | AAA | 2008-2017 | - | 2010-11- 326-WAS | Louisville | Free Agent | (MLB) |
| L.J. Hollins | P | GCL Nationals (Rk) Hagerstown (A) | 6-3 | 185 | R-R | 1991-07-31 | 20 | Madison,Mississippi | A | 2011-2014 | - | 2012-29- 894-WAS | Chipola Col | Free Agent | (MLB) |
| Greg Holt | P | Hagerstown (A) | 6-2 | 201 | R-R | 1989-06-19 | 23 | Clemmons,North Carolina | A+ | 2008-2014 | - | 2011- 8- 247-WAS | North Carolina | Free Agent | (MLB) |
| Destin Hood | OF | Auburn (A-) Harrisburg (AA) | 6-1 | 180 | R-R | 1990-04-03 | 22 | Eight Mile,Alabama | MLB | 2008-2018 | 2016-2016 | 2008- 2- 55-WAS | Minors | Texas Rangers (AA) | |
| Jeff Howell | C | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-0 | 200 | R-R | 1983-04-01 | 29 | Melbourne,Florida | AAA | 2004-2016 | - | 2005-10- 292-KCA | Florida So.Col, Indian River St | Free Agent | (MLB) |
| Will Hudgins | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 180 | R-R | 1990-02-12 | 22 | Richmond,Virginia | A | 2009-2013 | - | 2012-22- 684-WAS | Notre Dame | Retired | (MLB) |
| Devin Ivany | C | Harrisburg (AA) | 6-1 | 178 | R-R | 1982-07-27 | 29 | Fort Lauderdale,Florida | AAA | 2002-2013 | - | 2004- 6- 174-MON | South Florida | Free Agent | (MLB) |
| Cesar Izturis | SS-2B | Washington (MLB) | 5-9 | 155 | B-R | 1980-02-10 | 32 | Barquisimeto,Venezuela | MLB | 1997-2013 | 2001-2013 | 1996- UDFA-TOR | Free Agent | (MLB) | |
| Edwin Jackson | P | Washington (MLB) | 6-3 | 190 | R-R | 1983-09-09 | 28 | Neu-Ulm,Germany | MLB | 2001-2018 | 2003-2018 | 2001- 6- 190-LAN | Active | Washington Nationals (MLB) | |
| Hayden Jennings | OF | GCL Nationals (Rk) | 6-0 | 170 | L-L | 1992-10-16 | 19 | Shreveport,Louisiana | RK | 2012-2015 | - | 2012- 6- 204-WAS | Free Agent | (MLB) | |
| Hendry Jimenez | 2B | Hagerstown (A) | 5-10 | 160 | B-R | 1989-12-30 | 22 | Santo Domingo,Dom Rep | A | 2009-2012 | - | Free Agent | (MLB) | ||
| Josh Johnson | IF | Auburn (A-) Harrisburg (AA) Syracuse (AAA) | 5-10 | 190 | B-R | 1986-01-11 | 26 | Tampa,Florida | AAA | 2004-2015 | - | 2004- 3- 85-KCA | Free Agent | (MLB) | |
| Taylor Jordan | P | Auburn (A-) Hagerstown (A) | 6-3 | 190 | R-R | 1989-01-17 | 23 | Merritt Island,Florida | MLB | 2009-2018 | 2013-2015 | 2009- 9- 262-WAS | Free Agent | (MLB) | |
| Nate Karns | P | Hagerstown (A) Potomac (A+) | 6-5 | 230 | R-R | 1987-11-25 | 24 | Franklin,Pennsylvania | MLB | 2007-2017 | 2013-2017 | 2009-12- 352-WAS | Texas Tech U., North Carolina St | DL-60 | Kansas City Royals (MLB) |
| Blake Kelso | 3B | Potomac (A+) | 5-10 | 170 | R-R | 1989-03-28 | 23 | Austin,Texas | A+ | 2008-2013 | - | 2010-10- 296-WAS | Houston | Minors | Washington Nationals (MLB) |
| Kevin Keyes | 1B | Potomac (A+) | 6-3 | 225 | R-R | 1989-03-15 | 23 | Austin,Texas | AAA | 2008-2017 | - | 2010- 7- 206-WAS | Texas | Free Agent | (MLB) |
| Spencer Kieboom | C | Auburn (A-) | 6-0 | 220 | R-R | 1991-03-16 | 21 | Mount Pleasant,South Carolina | MLB | 2010-2018 | 2016-2018 | 2012- 5- 174-WAS | Clemson U. | Active | Washington Nationals (MLB) |
| Cole Kimball | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) Harrisburg (AA) | 6-3 | 240 | R-R | 1985-08-01 | 26 | Brooklyn,New York | MLB | 2004-2015 | 2011-2011 | 2006-12- 361-WAS | Centenary Col, St. John's U. | Free Agent | (MLB) |
| Stephen King | 1B-3B | Potomac (A+) Harrisburg (AA) | 6-2 | 195 | R-R | 1987-10-02 | 24 | Winter Park,Florida | AA | 2007-2013 | - | 2006- 3- 91-WAS | Free Agent | (MLB) | |
| Jeff Kobernus | OF | Harrisburg (AA) | 6-2 | 195 | R-R | 1988-06-30 | 24 | 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 | 24 | Camarillo,California | MLB | 2006-2015 | 2012-2012 | 2008- 8- 248-MIL | Cal St Fullerton, Vanguard So.California, Oxnard Col | Free Agent | (MLB) |
| Alex Kreis | P | GCL Nationals (Rk) Hagerstown (A) | 6-1 | 210 | R-R | 1989-05-30 | 23 | Grand Forks,North Dakota | A | 2011-2015 | - | 2011-35-1057-WAS | Jamestown Col | Free Agent | (MLB) |
| John Lannan | P | Syracuse (AAA) Washington (MLB) | 6-5 | 200 | L-L | 1984-09-27 | 27 | Long Beach,New York | MLB | 2003-2017 | 2007-2014 | 2005-11- 324-WAS | Siena Col | Minors | Washington Nationals (MLB) |
| Adam LaRoche | 1B | Washington (MLB) | 6-3 | 180 | L-L | 1979-11-06 | 32 | Orange,California | MLB | 2000-2015 | 2004-2015 | 2000-29- 880-ATL | Seminole St, Fort Scott CC | Retired | (MLB) |
| Nick Lee | P | Auburn (A-) | 6-0 | 180 | L-L | 1991-01-13 | 21 | San Antonio,Texas | AA | 2010-2018 | - | 2011-18- 547-WAS | Weatherford Col | Minors | Washington Nationals (AA) |
| Pat Lehman | P | Harrisburg (AA) Syracuse (AAA) | 6-4 | 215 | R-R | 1986-10-18 | 25 | Fair Lawn,New Jersey | AAA | 2006-2013 | - | 2009-13- 382-WAS | George Washington U. | Minors | Washington Nationals (MLB) |
| Sandy Leon | C | Auburn (A-) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 5-11 | 175 | B-R | 1989-03-13 | 23 | Caracas,Venezuela | MLB | 2007-2018 | 2012-2018 | 2007- UDFA-WAS | Active | Boston Red Sox (MLB) | |
| Cole Leonida | C | GCL Nationals (Rk) Hagerstown (A) | 6-3 | 218 | R-R | 1988-12-25 | 23 | Aurora,Colorado | AA | 2008-2016 | - | 2010- 6- 176-WAS | Georgia Tech | Free Agent | (MLB) |
| Brad Lidge | P | Potomac (A+) Washington (MLB) | 6-5 | 200 | R-R | 1976-12-23 | 35 | Sacramento,California | MLB | 1996-2012 | 2002-2012 | 1998- 1- 17-HOU | Notre Dame | Retired | - (MLB) |
| Bryan Lippincott | OF | GCL Nationals (Rk) | 6-3 | 210 | L-R | 1989-09-26 | 22 | Creston,Iowa | A | 2009-2013 | - | 2012-19- 594-WAS | Concordia Col | Minors | Washington Nationals (MLB) |
| Steve Lombardozzi | 2B | Washington (MLB) | 6-0 | 170 | B-R | 1988-09-20 | 23 | Fulton,Maryland | MLB | 2008-2018 | 2011-2017 | 2008-19- 571-WAS | St. Petersburg Col | Minors | Oakland Athletics (MLB) |
| Carlos Lopez | 1B | Auburn (A-) | 6-1 | 193 | R-R | 1990-01-18 | 22 | Boynton Beach,Florida | A | 2009-2015 | - | 2012-12- 384-WAS | Wake Forest U. | Free Agent | (MLB) |
| Reynaldo Lopez | P | DSL Nationals (Rk) | 6-0 | 185 | R-R | 1994-01-04 | 18 | San Pedro de Mac,Dom Rep | MLB | 2012-2018 | 2016-2018 | 2012- UDFA-WAS | Active | Chicago White Sox (MLB) | |
| Jose Lozada | SS-3B | Harrisburg (AA) | 6-0 | 180 | B-R | 1985-12-29 | 26 | Las Piedras,Puerto Rico | AAA | 2005-2017 | - | 2008-17- 511-WAS | Bethune-Cookman U., Miami-Dade Col, Benedictine Col | Free Agent | (MLB) |
| Bobby Lucas | P | GCL Nationals (Rk) Hagerstown (A) | 6-4 | 195 | L-L | 1987-08-12 | 24 | Baltimore,Maryland | A | 2007-2013 | - | 2011-27- 817-WAS | George Washington U. | Free Agent | (MLB) |
| Mike MacDougal | P | Syracuse (AAA) | 6-4 | 195 | R-R | 1977-03-05 | 35 | Las Vegas,Nevada | MLB | 1997-2014 | 2001-2012 | 1999- 1- 25-KCA | Wake Forest U. | Free Agent | (MLB) |
| Carlos Maldonado | C | Potomac (A+) Syracuse (AAA) Washington (MLB) | 6-2 | 180 | R-R | 1979-01-03 | 33 | Maracaibo,Venezuela | MLB | 1996-2013 | 2006-2012 | 1996- UDFA-SEA | Minors | Texas Rangers (AA) | |
| Jeff Mandel | P | Harrisburg (AA) Syracuse (AAA) | 6-3 | 200 | B-R | 1985-04-30 | 27 | Houston,Texas | AAA | 2004-2013 | - | 2007-19- 580-WAS | Baylor U. | Free Agent | (MLB) |
| Craig Manuel | C | Auburn (A-) | 6-2 | 210 | L-R | 1990-05-22 | 22 | Rockville,Maryland | AAA | 2009-2015 | - | 2012-10- 324-WAS | Rice U. | Free Agent | (MLB) |
| Anthony Marcelino | P | GCL Nationals (Rk) | 6-3 | 175 | R-R | 1993-01-21 | 19 | Valencia,Venezuela | RK | 2010-2012 | - | Free Agent | (MLB) | ||
| Jose Marmolejos | 1B | DSL Nationals (Rk) | 6-1 | 185 | L-L | 1993-01-02 | 19 | Perth Amboy,New Jersey | AAA | 2011-2018 | - | Minors | Washington Nationals (AAA) | ||
| Chris Marrero | 1B | Auburn (A-) Hagerstown (A) Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-3 | 210 | R-R | 1988-07-02 | 23 | Miami,Florida | MLB | 2006-2017 | 2011-2017 | 2006- 1- 15-WAS | International | (MLB) | |
| Rafael Martin | P | GCL Nationals (Rk) Harrisburg (AA) Syracuse (AAA) | 6-2 | 195 | R-R | 1984-05-16 | 28 | San Fernando,California | MLB | 2007-2017 | 2015-2016 | 2010- UDFA-WAS | Free Agent | (MLB) | |
| Anderson Martinez | P | DSL Nationals (Rk) | 6-3 | 180 | R-R | 1993-02-22 | 19 | Barquisimeto,Venezuela | A- | 2011-2014 | - | Minors | Washington Nationals (MLB) | ||
| Andres Martinez | SS | DSL Nationals (Rk) | 6-1 | 170 | R-R | 1995-07-07 | 16 | Carrizal,Venezuela | A- | 2012-2017 | - | Free Agent | (MLB) | ||
| Estarlin Martinez | OF | Auburn (A-) | 6-1 | 185 | R-R | 1992-03-08 | 20 | Bani,Dom Rep | A+ | 2010-2015 | - | Free Agent | (MLB) | ||
| Jason Martinson | SS | Hagerstown (A) Potomac (A+) | 6-1 | 190 | R-R | 1988-10-15 | 23 | Bedford,Texas | AAA | 2008-2018 | - | 2010- 5- 146-WAS | Texas St | Minors | Washington Nationals (AAA) |
| Ryan Mattheus | P | Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-3 | 215 | R-R | 1983-11-10 | 28 | Elk Grove,California | MLB | 2003-2016 | 2011-2015 | 2003-19- 557-COL | Sacramento City Col | Free Agent | (MLB) |
| Yunesky Maya | P | Syracuse (AAA) | 5-11 | 170 | R-R | 1981-08-28 | 30 | Pinar del Rio,Cuba | MLB | 2010-2016 | 2010-2013 | 2010- UDFA-WAS | Free Agent | (MLB) | |
| Jeremy Mayo | C | Hagerstown (A) Harrisburg (AA) | 5-10 | 173 | R-R | 1988-06-17 | 24 | Oklahoma City,Oklahoma | AA | 2008-2013 | - | 2010-31- 926-WAS | Texas Tech U. | Free Agent | (MLB) |
| Manuel Mayorson | 3B-2B | Harrisburg (AA) Syracuse (AAA) | 5-10 | 167 | R-R | 1983-03-10 | 29 | Higuey,Dom Rep | AAA | 2000-2013 | - | Free Agent | - (MLB) | ||
| Shane McCatty | P | GCL Nationals (Rk) Potomac (A+) | 6-2 | 190 | R-R | 1987-05-18 | 25 | Oxford,Michigan | A+ | 2008-2012 | - | 2009-34-1012-WAS | Oakland U., Grand Rapids CC | Free Agent | (MLB) |
| Chris McConnell | SS | Harrisburg (AA) Syracuse (AAA) | 5-11 | 170 | R-R | 1985-12-18 | 26 | Philadelphia,Pennsylvania | AAA | 2004-2012 | - | 2004- 9- 265-KCA | Free Agent | (MLB) | |
| Patrick McCoy | P | Harrisburg (AA) | 6-4 | 200 | L-L | 1988-08-03 | 23 | Tucson,Arizona | MLB | 2007-2018 | 2014-2014 | 2007-10- 310-WAS | Free Agent | (MLB) | |
| Jack McGeary | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 195 | L-L | 1989-03-19 | 23 | Boston,Massachusetts | A+ | 2007-2014 | - | 2007- 6- 190-WAS | Free Agent | (MLB) | |
| Christopher McKenzie | P | GCL Nationals (Rk) Hagerstown (A) | 6-3 | 185 | R-R | 1989-12-06 | 22 | Marlboro,Massachusetts | A | 2009-2013 | - | 2010-13- 386-WAS | San Jacinto Col | Free Agent | (MLB) |
| Mike McQuillan | 3B | GCL Nationals (Rk) Auburn (A-) | 5-11 | 165 | R-R | 1989-10-02 | 22 | Evergreen Park,Illinois | A+ | 2009-2014 | - | 2012-33-1014-WAS | Iowa | Free Agent | (MLB) |
| Silvio Medina | P | Auburn (A-) | 6-1 | 190 | R-R | 1990-06-30 | 22 | Bahoruco,Dom Rep | A- | 2010-2013 | - | Free Agent | (MLB) | ||
| Bryan Mejia | 2B | DSL Nationals (Rk) | 6-1 | 170 | B-R | 1994-03-02 | 18 | Bani,Dom Rep | A+ | 2011-2018 | - | Minors | Washington Nationals (A+) | ||
| Gilberto Mendez | P | GCL Nationals (Rk) Auburn (A-) | 6-0 | 165 | R-R | 1992-11-17 | 19 | Santo Domingo,Dom Rep | AA | 2011-2017 | - | Free Agent | (MLB) | ||
| Yermin Mercedes | C | DSL Nationals (Rk) | 5-11 | 175 | R-R | 1993-02-14 | 19 | La Romana,Dom Rep | AA | 2011-2018 | - | Minors | Chicago White Sox (A+) | ||
| Narciso Mesa | OF | GCL Nationals (Rk) Auburn (A-) Hagerstown (A) | 5-11 | 175 | R-R | 1991-11-16 | 20 | Azua,Dom Rep | A+ | 2010-2016 | - | Minors | Los Angeles Dodgers (MLB) | ||
| Alex Meyer | P | Hagerstown (A) Potomac (A+) | 6-9 | 220 | R-R | 1990-01-03 | 22 | Greensburg,Indiana | MLB | 2009-2017 | 2015-2017 | 2011- 1- 23-WAS | Kentucky | DL-60 | Los Angeles Angels (MLB) |
| Christian Meza | P | Hagerstown (A) | 6-0 | 185 | L-L | 1990-08-03 | 21 | Anaheim,California | AAA | 2009-2016 | - | 2010-25- 746-WAS | Santa Ana Col | Free Agent | (MLB) |
| Jason Michaels | LF | Syracuse (AAA) | 6-0 | 205 | R-R | 1976-05-04 | 36 | Tampa,Florida | MLB | 1997-2012 | 2001-2011 | 1998- 4- 104-PHI | Miami, NWFlorida St | Free Agent | - (MLB) |
| Adalberto Mieses | P | GCL Nationals (Rk) | 6-3 | 190 | R-R | 1990-01-01 | 22 | Santo Domingo,Dom Rep | RK | 2010-2012 | - | Free Agent | (MLB) | ||
| Brandon Miller | OF | Auburn (A-) | 6-1 | 204 | R-R | 1989-10-08 | 22 | Tyrone,Georgia | A+ | 2009-2015 | - | 2012- 4- 144-WAS | Georgia Tech, NWFlorida St, Samford U. | Retired | (MLB) |
| Justin Miller | 3B-1B | Hagerstown (A) | 6-0 | 180 | R-R | 1988-11-28 | 23 | Knoxville,Tennessee | A+ | 2008-2014 | - | 2010-18- 536-WAS | Middle Tennessee St | Free Agent | (MLB) |
| Richie Mirowski | P | Auburn (A-) Hagerstown (A) | 6-2 | 190 | R-R | 1989-04-30 | 23 | San Mateo,California | AA | 2008-2016 | - | 2011-45-1357-WAS | Oklahoma Baptist U., Cuesta Col | Free Agent | (MLB) |
| Blake Monar | P | Auburn (A-) | 6-2 | 190 | L-L | 1989-06-16 | 23 | Rockport,Indiana | A- | 2009-2015 | - | 2011-12- 367-WAS | Indiana U. | Free Agent | (MLB) |
| Angelberth Montilla | RF-CF | Auburn (A-) Hagerstown (A) | 6-1 | 180 | R-R | 1989-04-11 | 23 | Maracay,Venezuela | A | 2009-2012 | - | Free Agent | - (MLB) | ||
| Brett Mooneyham | P | Auburn (A-) | 6-5 | 215 | L-L | 1990-01-24 | 22 | 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 | 25 | Laurel,Mississippi | MLB | 2007-2017 | 2012-2017 | 2008-16- 481-WAS | Mississippi St, Meridian CC | Free Agent | (MLB) |
| Wade Moore | LF | Potomac (A+) | 6-0 | 206 | L-R | 1987-12-27 | 24 | Cleveland,North Carolina | A+ | 2007-2012 | - | 2010-19- 566-WAS | North Carolina St, Catawba Col | (MLB) | |
| Mike Morse | RF | Hagerstown (A) Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-5 | 195 | R-R | 1982-03-22 | 30 | Fort Lauderdale,Florida | MLB | 2000-2017 | 2005-2017 | 2000- 3- 82-CHA | Free Agent | (MLB) | |
| Felix Moscat | P | DSL Nationals (Rk) | 6-2 | 160 | R-R | 1990-12-02 | 21 | Santo Domingo,Dom Rep | RK | 2011-2012 | - | (MLB) | |||
| Michael Mudron | P | GCL Nationals (Rk) | 5-11 | 190 | L-L | 1990-02-04 | 22 | Riverside,California | A- | 2011-2013 | - | 2012-32- 984-WAS | Cal St San Bernardino, Riverside CC | Free Agent | (MLB) |
| Xavier Nady | OF | Potomac (A+) Washington (MLB) | 6-2 | 205 | R-R | 1978-11-14 | 33 | Carmel,California | MLB | 1998-2014 | 2000-2014 | 2000- 2- 49-SDN | California | Free Agent | - (MLB) |
| Miguel Navarro | P | DSL Nationals (Rk) | 6-2 | 180 | R-R | 1993-03-04 | 19 | La Romana,Dom Rep | RK | 2010-2012 | - | (MLB) | |||
| Jim Negrych | 2B | Harrisburg (AA) Syracuse (AAA) | 5-10 | 180 | L-R | 1985-03-02 | 27 | Buffalo,New York | AAA | 2004-2014 | - | 2006- 6- 170-PIT | Pittsburgh | Free Agent | (MLB) |
| Hector Nelo | P | Harrisburg (AA) | 6-1 | 200 | R-R | 1986-11-05 | 25 | Maracay,Venezuela | AA | 2005-2017 | - | 2007-15- 470-TEX | Savannah St, Saint Thomas U. | Free Agent | (MLB) |
| Brett Newsome | 1B | Hagerstown (A) | 6-2 | 210 | L-L | 1986-08-24 | 25 | Palos Heights,Illinois | A | 2006-2012 | - | Western Michigan U., Missouri So.State U. | Free Agent | (MLB) | |
| Sean Nicol | 3B | Potomac (A+) Harrisburg (AA) | 5-11 | 170 | R-R | 1986-09-25 | 25 | Scottsdale,Arizona | AAA | 2006-2014 | - | 2009-16- 472-WAS | Portland, San Diego | Free Agent | (MLB) |
| Adrian Nieto | C | GCL Nationals (Rk) Hagerstown (A) | 6-0 | 200 | B-R | 1989-11-12 | 22 | Havana,Cuba | MLB | 2008-2018 | 2014-2014 | 2008- 5- 151-WAS | Free Agent | (MLB) | |
| Tony Nix | LF | GCL Nationals (Rk) | 5-11 | 175 | R-R | 1989-02-03 | 23 | San Diego,California | RK | 2008-2012 | - | 2011-50-1507-WAS | California-Riverside | Free Agent | (MLB) |
| Khayyan Norfork | 3B-2B | Auburn (A-) Hagerstown (A) | 5-10 | 170 | R-R | 1989-01-19 | 23 | Jackson,Tennessee | AAA | 2010-2018 | - | 2011-23- 697-WAS | Tennessee, Jackson St CC | Minors | Washington Nationals (AA) |
| Randolph Oduber | OF | Potomac (A+) | 6-3 | 186 | R-L | 1989-03-18 | 23 | Paradera,Aruba | AA | 2009-2018 | - | 2010-32- 956-WAS | Western Oklahoma St | Free Agent | (MLB) |
| Adam Olbrychowski | P | Potomac (A+) Harrisburg (AA) | 6-2 | 180 | R-R | 1986-09-07 | 25 | Malibu,California | AA | 2005-2012 | - | 2007- 5- 184-NYA | Pepperdine U. | Free Agent | (MLB) |
| Bryce Ortega | SS | GCL Nationals (Rk) Hagerstown (A) | 5-11 | 175 | R-R | 1988-09-22 | 23 | Manhattan Beach,California | A | 2008-2012 | - | 2011-41-1237-WAS | Arizona | Free Agent | (MLB) |
| Tim Pahuta | 1B | Harrisburg (AA) | 6-4 | 225 | L-R | 1983-05-03 | 29 | Somerset,New Jersey | AA | 2002-2013 | - | 2005-18- 534-WAS | Seton Hall U. | Free Agent | - (MLB) |
| Sam Palace | C | Hagerstown (A) Potomac (A+) | 6-5 | 230 | R-R | 1986-08-02 | 25 | Clarkston,Michigan | AAA | 2007-2013 | - | Florida Institute Technology | Minors | Washington Nationals (MLB) | |
| Xavier Paul | LF | Syracuse (AAA) | 5-11 | 185 | L-R | 1985-02-25 | 27 | Slidell,Louisiana | MLB | 2003-2018 | 2009-2014 | 2003- 4- 121-LAN | Free Agent | (MLB) | |
| Hassan Pena | P | Syracuse (AAA) | 6-2 | 210 | R-R | 1985-03-25 | 27 | Havana,Cuba | AAA | 2007-2017 | - | 2006-13- 391-WAS | Palm Beach St | Free Agent | (MLB) |
| Ronald Pena | P | GCL Nationals (Rk) Auburn (A-) | 6-4 | 210 | R-R | 1991-09-19 | 20 | West Palm Beach,Florida | AA | 2011-2018 | - | 2012-16- 504-WAS | Col. Charleston, Palm Beach St | Minors | Washington Nationals (AA) |
| Eury Perez | OF | GCL Nationals (Rk) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-0 | 180 | R-R | 1990-05-30 | 22 | San Luis,Dom Rep | MLB | 2009-2018 | 2012-2015 | 2007- UDFA-WAS | Minors | San Francisco Giants (Rk) | |
| Stephen Perez | SS | GCL Nationals (Rk) Auburn (A-) | 5-11 | 175 | B-R | 1990-12-16 | 21 | Miami,Florida | AAA | 2010-2018 | - | 2012- 8- 264-WAS | Miami | Free Agent | - (MLB) |
| Ryan Perry | P | Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-4 | 200 | R-R | 1987-02-13 | 25 | Pomona,California | MLB | 2006-2015 | 2009-2012 | 2008- 1- 21-DET | Arizona | Free Agent | (MLB) |
| John Peters | P | GCL Nationals (Rk) Auburn (A-) | 6-3 | 225 | R-R | 1989-06-15 | 23 | Indianapolis,Indiana | A- | 2011-2012 | - | Augustana Col | Retired | (MLB) | |
| Ivan Pineyro | P | GCL Nationals (Rk) Auburn (A-) | 6-1 | 198 | R-R | 1991-09-29 | 20 | San Cristobal,Dom Rep | AAA | 2011-2018 | - | DL-7 | Los Angeles Angels (AAA) | ||
| Will Piwnica-Worms | OF | GCL Nationals (Rk) | 6-2 | 190 | R-R | 1990-04-01 | 22 | St. Louis,Missouri | A+ | 2009-2014 | - | Duke U. | Restricted | Washington Nationals (A+) | |
| Shawn Pleffner | 1B | Auburn (A-) | 6-4 | 220 | L-R | 1989-08-17 | 22 | Washington,DC | AA | 2008-2017 | - | 2011-26- 787-WAS | Tampa, Tallahassee CC | Free Agent | (MLB) |
| Jordan Poole | OF | GCL Nationals (Rk) Auburn (A-) | 6-3 | 210 | R-R | 1991-09-11 | 20 | Calhoun,Georgia | A- | 2011-2013 | - | 2012-14- 444-WAS | Mississippi, Chipola Col | Free Agent | (MLB) |
| Kevin Pucetas | P | Harrisburg (AA) Syracuse (AAA) | 6-4 | 225 | R-L | 1984-11-27 | 27 | Spartanburg,South Carolina | AAA | 2003-2014 | - | 2006-17- 506-SFN | Limestone Col | Free Agent | (MLB) |
| Matt Purke | P | Hagerstown (A) | 6-3 | 175 | L-L | 1990-07-17 | 21 | Spring,Texas | MLB | 2010-2018 | 2016-2016 | 2011- 3- 96-WAS | Texas Christian U. | DL-7 | New York Mets (AAA) |
| Chris Rahl | OF | Harrisburg (AA) | 6-0 | 185 | R-R | 1983-12-05 | 28 | Morristown,New Jersey | AAA | 2003-2014 | - | 2005- 5- 141-ARI | Col. William and Mary | Free Agent | (MLB) |
| Algenis Ramirez | P | DSL Nationals (Rk) | 6-3 | 175 | R-R | 1994-04-11 | 18 | Santo Domingo,Dom Rep | RK | 2011-2013 | - | (MLB) | |||
| Andruth Ramirez | C | Auburn (A-) | 5-11 | 180 | R-R | 1989-03-10 | 23 | Azua,Dom Rep | A | 2010-2013 | - | Free Agent | (MLB) | ||
| J.P. Ramirez | LF | Hagerstown (A) Potomac (A+) | 5-10 | 185 | L-L | 1989-09-29 | 22 | New Braunfels,Texas | AAA | 2009-2017 | - | 2008-15- 451-WAS | Free Agent | (MLB) | |
| David Ramos | P | DSL Nationals (Rk) | 6-0 | 175 | R-R | 1991-09-13 | 20 | Guacara,Venezuela | A | 2012-2017 | - | Free Agent | (MLB) | ||
| Wander Ramos | OF | Auburn (A-) | 6-3 | 192 | R-R | 1990-04-26 | 22 | Santo Domingo,Dom Rep | A | 2010-2014 | - | Free Agent | (MLB) | ||
| Wilson Ramos | C | Washington (MLB) | 6-0 | 178 | R-R | 1987-08-10 | 24 | Valencia,Venezuela | MLB | 2006-2018 | 2010-2018 | 2004- UDFA-MIN | Active | Philadelphia Phillies (MLB) | |
| Caleb Ramsey | OF | Hagerstown (A) | 6-2 | 175 | L-R | 1988-10-07 | 23 | Houston,Texas | AAA | 2008-2017 | - | 2011-11- 337-WAS | Houston | Free Agent | (MLB) |
| Brian Rauh | P | Auburn (A-) Hagerstown (A) | 6-2 | 200 | R-R | 1991-07-23 | 20 | Lake Forest,California | AA | 2010-2015 | - | 2012-11- 354-WAS | Chapman U. | Minors | Washington Nationals (MLB) |
| Robbie Ray | P | Potomac (A+) | 6-2 | 169 | L-L | 1991-10-01 | 20 | Brentwood,Tennessee | MLB | 2011-2018 | 2014-2018 | 2010-12- 356-WAS | Active | Arizona Diamondbacks (MLB) | |
| Raudy Read | C | DSL Nationals (Rk) | 6-0 | 170 | R-R | 1993-10-29 | 18 | San Jose de Ocoa,Dom Rep | MLB | 2011-2018 | 2017-2017 | 2011- UDFA-MIA | Active | Washington Nationals (MLB) | |
| Tony Renda | 2B | Auburn (A-) | 5-10 | 170 | R-R | 1991-01-24 | 21 | Santa Rosa,California | MLB | 2010-2018 | 2016-2018 | 2012- 2- 80-WAS | California | Active | Boston Red Sox (MLB) |
| Anthony Rendon | 2B | GCL Nationals (Rk) Auburn (A-) Potomac (A+) Harrisburg (AA) | 5-11 | 170 | R-R | 1990-06-06 | 22 | Houston,Texas | MLB | 2009-2018 | 2013-2018 | 2011- 1- 6-WAS | Rice U. | Active | Washington Nationals (MLB) |
| Carlos Rivero | 3B | Syracuse (AAA) | 6-3 | 198 | R-R | 1988-05-20 | 24 | Barquisimeto,Venezuela | MLB | 2006-2017 | 2014-2014 | 2005- UDFA-CLE | Free Agent | (MLB) | |
| Tanner Roark | P | Syracuse (AAA) | 6-2 | 200 | R-R | 1986-10-05 | 25 | Wilmington,Illinois | MLB | 2006-2018 | 2013-2018 | 2008-25- 753-TEX | Illinois | Active | Washington Nationals (MLB) |
| Henry Rodriguez | P | Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-1 | 175 | R-R | 1987-02-25 | 25 | Santa Barbara,Venezuela | MLB | 2006-2014 | 2009-2014 | 2003- UDFA-OAK | Free Agent | (MLB) | |
| Jefry Rodriguez | P | DSL Nationals (Rk) | 6-5 | 185 | R-R | 1993-07-26 | 18 | Haina,Dom Rep | MLB | 2012-2018 | 2018-2018 | Active | Washington Nationals (MLB) | ||
| Kelvin Rodriguez | P | DSL Nationals (Rk) | 6-0 | 190 | R-R | 1991-11-06 | 20 | Las Terrenas de Samana,Dom Rep | RK | 2010-2013 | - | Minors | Atlanta Braves (MLB) | ||
| Wilman Rodriguez | OF | GCL Nationals (Rk) | 6-1 | 175 | R-R | 1991-06-07 | 21 | San Francisco de Macoris,Dom Rep | A | 2011-2015 | - | Free Agent | (MLB) | ||
| Danny Rosenbaum | P | Harrisburg (AA) | 6-1 | 205 | R-L | 1987-10-10 | 24 | Loveland,Ohio | AAA | 2007-2015 | - | 2009-22- 652-WAS | Indiana U., Xavier U. | Free Agent | (MLB) |
| Adderling Ruiz | C | GCL Nationals (Rk) | 6-1 | 175 | R-R | 1991-05-03 | 21 | Cambita Garabito,Dom Rep | AA | 2010-2018 | - | DL-7 | Washington Nationals (A+) | ||
| Raul Ruiz | P | DSL Nationals (Rk) | 5-10 | 160 | L-L | 1990-12-04 | 21 | Altagracia,Venezuela | RK | 2012-2012 | - | (MLB) | |||
| Melvi Salazar | P | DSL Nationals (Rk) | 6-1 | 175 | R-R | 1994-12-17 | 17 | Carupano,Venezuela | RK | 2012-2014 | - | Free Agent | (MLB) | ||
| Adrian Sanchez | SS-2B | Potomac (A+) | 6-0 | 160 | B-R | 1990-08-16 | 21 | Maracaibo,Venezuela | MLB | 2009-2018 | 2017-2018 | 2007- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Mario Sanchez | P | DSL Nationals (Rk) | 6-1 | 166 | R-R | 1994-10-31 | 17 | Maracaibo,Venezuela | AA | 2012-2018 | - | Minors | Philadelphia Phillies (Rk) | ||
| Andy Santana | P | GCL Nationals (Rk) | 6-2 | 187 | R-R | 1990-12-05 | 21 | San Pedro de Mac,Dom Rep | RK | 2010-2012 | - | Free Agent | (MLB) | ||
| Wes Schill | OF | Auburn (A-) | 5-9 | 170 | R-R | 1989-11-22 | 22 | College Station,Texas | A | 2009-2013 | - | Western Oklahoma St, NE Texas CC | Free Agent | (MLB) | |
| Mike Schultz | P | GCL Nationals (Rk) | 6-7 | 210 | R-R | 1979-11-28 | 32 | Van Nuys,California | MLB | 1998-2013 | 2007-2007 | 2000- 2- 69-ARI | Loyola Marymount U. | Free Agent | (MLB) |
| Blake Schwartz | P | GCL Nationals (Rk) Hagerstown (A) | 6-3 | 200 | R-R | 1989-10-09 | 22 | Rosemount,Minnesota | AA | 2012-2015 | - | 2012-17- 534-WAS | Oklahoma City U. | Retired | (MLB) |
| Beau Seabury | C | Potomac (A+) Harrisburg (AA) | 6-1 | 195 | R-R | 1985-06-13 | 27 | Mount Vernon,Washington | AA | 2006-2012 | - | 2007-13- 402-COL | Skagit Valley Col, Virginia | (MLB) | |
| Derek Self | P | Auburn (A-) | 6-2 | 185 | R-R | 1990-01-14 | 22 | Cave City,Kentucky | AAA | 2009-2018 | - | 2012- 9- 294-WAS | Louisville | Minors | Washington Nationals (AA) |
| Cameron Selik | P | Potomac (A+) Harrisburg (AA) | 6-4 | 230 | R-R | 1987-08-25 | 24 | San Diego,California | AA | 2006-2013 | - | 2010-22- 656-WAS | Kansas, Grossmont Col | Free Agent | (MLB) |
| Casey Selsor | P | GCL Nationals (Rk) | 6-2 | 175 | L-L | 1990-02-23 | 22 | San Antonio,Texas | A- | 2009-2013 | - | 2012-23- 714-WAS | Texas-San Antonio | Free Agent | (MLB) |
| Brayan Serrata | C | DSL Nationals (Rk) | 6-3 | 175 | R-R | 1994-06-17 | 18 | Santo Domingo,Dom Rep | A- | 2012-2016 | - | Free Agent | (MLB) | ||
| Atahualpa Severino | P | Syracuse (AAA) | 5-9 | 170 | L-L | 1984-11-06 | 27 | Cotui,Dom Rep | MLB | 2007-2016 | 2011-2011 | 2004- UDFA-MON | Free Agent | (MLB) | |
| Pedro Severino | C | GCL Nationals (Rk) | 6-1 | 180 | R-R | 1993-07-20 | 18 | Bonao,Dom Rep | MLB | 2011-2018 | 2015-2018 | 2010- UDFA-WAS | Active | Washington Nationals (MLB) | |
| Hector Silvestre | P | DSL Nationals (Rk) | 6-3 | 180 | L-L | 1992-12-14 | 19 | San Pedro de Mac,Dom Rep | A+ | 2011-2018 | - | Free Agent | (MLB) | ||
| Todd Simko | P | Hagerstown (A) | 6-5 | 220 | L-L | 1988-12-05 | 23 | Arroyo Grande,California | A | 2008-2013 | - | 2011-21- 637-WAS | Texas A&M U.-Corpus Christi, Cuesta Col | Retired | (MLB) |
| James Skelton | C | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 5-11 | 165 | L-R | 1985-10-28 | 26 | West Covina,California | AAA | 2004-2018 | - | 2004-14- 403-DET | Free Agent | (MLB) | |
| Matt Skole | 1B | Hagerstown (A) Potomac (A+) | 6-4 | 246 | L-R | 1989-07-30 | 22 | Woodstock,Georgia | MLB | 2009-2018 | 2018-2018 | 2011- 5- 157-WAS | Georgia Tech | Minors | Chicago White Sox (AAA) |
| Jason Smith | P | Auburn (A-) Hagerstown (A) | 6-3 | 180 | R-R | 1990-08-07 | 21 | Clinton,Iowa | A | 2010-2013 | - | Western Illinois U. | Retired | (MLB) | |
| Josh Smoker | P | GCL Nationals (Rk) Hagerstown (A) Potomac (A+) | 6-2 | 195 | L-L | 1988-11-26 | 23 | Calhoun,Georgia | MLB | 2007-2018 | 2016-2018 | 2007- 1- 31-WAS | Free Agent | (MLB) | |
| Jhonatan Solano | C | GCL Nationals (Rk) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-0 | 180 | R-R | 1985-08-12 | 26 | Barranquilla,Colombia | MLB | 2006-2017 | 2012-2015 | 2005- UDFA-WAS | DL-60 | Washington Nationals (MLB) | |
| Francisco Soriano | SS-3B | Potomac (A+) | 5-11 | 169 | B-R | 1987-06-16 | 25 | Azua,Dom Rep | AAA | 2008-2013 | - | Minors | Washington Nationals (MLB) | ||
| Steven Souza | OF | Hagerstown (A) Potomac (A+) | 6-4 | 195 | R-R | 1989-04-24 | 23 | Seattle,Washington | MLB | 2007-2018 | 2014-2018 | 2007- 3- 100-WAS | Active | Arizona Diamondbacks (MLB) | |
| Craig Stammen | P | Washington (MLB) | 6-3 | 200 | R-R | 1984-03-09 | 28 | Coldwater,Ohio | MLB | 2003-2018 | 2009-2018 | 2005-12- 354-WAS | Dayton | Active | San Diego Padres (MLB) |
| Drew Storen | P | Potomac (A+) Harrisburg (AA) Washington (MLB) | 6-2 | 180 | B-R | 1987-08-11 | 24 | 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 | 23 | San Diego,California | MLB | 2007-2018 | 2010-2018 | 2009- 1- 1-WAS | San Diego St | Active | Washington Nationals (MLB) |
| Wester Suarez | 1B | DSL Nationals (Rk) | 6-2 | 195 | L-L | 1994-11-10 | 17 | Santo Domingo,Dom Rep | RK | 2012-2013 | - | (MLB) | |||
| Wander Suero | P | DSL Nationals (Rk) | 6-3 | 175 | R-R | 1991-09-15 | 20 | Sabana Larga,Dom Rep | MLB | 2010-2018 | 2018-2018 | Active | Washington Nationals (MLB) | ||
| Kurt Suzuki | C | Washington (MLB) | 5-11 | 200 | R-R | 1983-10-04 | 28 | Wailuku,Hawaii | MLB | 2002-2018 | 2007-2018 | 2004- 2- 67-OAK | Cal St Fullerton | Active | Atlanta Braves (MLB) |
| Matt Swynenberg | P | Potomac (A+) | 6-5 | 195 | R-R | 1989-02-16 | 23 | Davenport,Iowa | AAA | 2008-2015 | - | 2009-28- 832-WAS | Black Hawk Col | Restricted | Washington Nationals (AAA) |
| Ryan Tatusko | P | Harrisburg (AA) | 6-5 | 200 | R-R | 1985-03-27 | 27 | Merrillville,Indiana | AAA | 2005-2014 | - | 2007-18- 560-TEX | Indiana St | Free Agent | (MLB) |
| Michael Taylor | OF | Potomac (A+) | 6-2 | 190 | R-R | 1991-03-26 | 21 | Fort Lauderdale,Florida | MLB | 2010-2018 | 2014-2018 | 2009- 6- 172-WAS | Active | Washington Nationals (MLB) | |
| Mark Teahen | 3B-OF | Syracuse (AAA) | 6-3 | 210 | L-R | 1981-09-06 | 30 | Redlands,California | MLB | 2000-2013 | 2005-2011 | 2002- 1- 39-OAK | St. Mary's Col California | Retired | (MLB) |
| Joe Testa | P | Potomac (A+) Harrisburg (AA) | 5-10 | 175 | L-L | 1985-12-18 | 26 | Jackson,New Jersey | AA | 2005-2017 | - | Wagner Col | Free Agent | (MLB) | |
| Jorge Tillero | C | DSL Nationals (Rk) | 5-11 | 160 | R-R | 1993-12-21 | 18 | Maturin,Venezuela | A | 2011-2017 | - | Restricted | Washington Nationals (A) | ||
| Chad Tracy | 1B | Potomac (A+) Syracuse (AAA) Washington (MLB) | 6-2 | 190 | L-R | 1980-05-22 | 32 | Charlotte,North Carolina | MLB | 1999-2013 | 2004-2013 | 2001- 7- 218-ARI | East Carolina U. | Free Agent | (MLB) |
| Jonathan Tucker | RF-2B | Harrisburg (AA) | 5-7 | 178 | B-R | 1983-07-02 | 28 | Oakland,California | AAA | 2002-2015 | - | 2004-20- 589-BAL | Florida | Free Agent | (MLB) |
| Kylin Turnbull | P | GCL Nationals (Rk) Hagerstown (A) | 6-5 | 185 | R-L | 1989-09-12 | 22 | Hillsboro,Oregon | A+ | 2012-2018 | - | 2011- 4- 127-WAS | Santa Barbara City Col | Minors | Washington Nationals (A+) |
| Jean Carlos Valdez | 3B-1B | GCL Nationals (Rk) | 6-2 | 190 | R-R | 1993-03-14 | 19 | Bani,Dom Rep | A+ | 2010-2014 | - | Free Agent | (MLB) | ||
| Jesus Valdez | LF | Harrisburg (AA) Syracuse (AAA) | 6-2 | 170 | R-R | 1984-11-02 | 27 | San Cristobal,Dom Rep | AAA | 2003-2017 | - | Free Agent | - (MLB) | ||
| Phillips Valdez | P | DSL Nationals (Rk) | 6-2 | 160 | R-R | 1991-11-16 | 20 | San Pedro de Mac,Dom Rep | AAA | 2010-2018 | - | Minors | Washington Nationals (AAA) | ||
| Maximo Valerio | P | DSL Nationals (Rk) | 6-2 | 175 | R-R | 1995-07-22 | 16 | Santo Domingo,Dom Rep | A- | 2012-2016 | - | Free Agent | (MLB) | ||
| Cory Van Allen | P | Harrisburg (AA) Syracuse (AAA) | 6-2 | 180 | L-L | 1984-12-24 | 27 | Bakersfield,California | AAA | 2004-2015 | - | 2006- 5- 151-WAS | Baylor U. | Free Agent | - (MLB) |
| Jimmy Van Ostrand | 1B | Harrisburg (AA) | 6-4 | 210 | R-R | 1984-08-07 | 27 | Vancouver,BC | AAA | 2003-2013 | - | 2006- 8- 249-HOU | Allan Hancock Col, Cal Poly | Free Agent | (MLB) |
| Daury Vasquez | P | GCL Nationals (Rk) | 6-4 | 170 | R-R | 1992-11-21 | 19 | Santiago,Dom Rep | RK | 2011-2014 | - | Free Agent | (MLB) | ||
| Andrew Wall | P | Auburn (A-) | 6-3 | 210 | L-L | 1989-04-10 | 23 | Ithaca,New York | A- | 2012-2012 | - | Ithaca Col | (MLB) | ||
| Zach Walters | SS | Potomac (A+) Harrisburg (AA) Syracuse (AAA) | 6-3 | 195 | L-R | 1989-09-05 | 22 | Cheyenne,Wyoming | MLB | 2008-2018 | 2013-2016 | 2010- 9- 271-ARI | San Diego | Free Agent | (MLB) |
| Chien-Ming Wang | P | Hagerstown (A) Potomac (A+) Harrisburg (AA) Syracuse (AAA) Washington (MLB) | 6-3 | 230 | R-R | 1980-03-31 | 32 | Tainan,Taiwan | MLB | 2000-2016 | 2005-2016 | 2000- UDFA-NYA | Free Agent | (MLB) | |
| Elliott Waterman | P | Auburn (A-) | 6-4 | 195 | L-L | 1990-11-24 | 21 | Martinez,California | A- | 2010-2015 | - | 2012-13- 414-WAS | San Francisco | Free Agent | (MLB) |
| Kris Watts | C | Harrisburg (AA) | 6-1 | 200 | L-R | 1984-07-15 | 27 | Fremont,California | AAA | 2005-2013 | - | 2006-16- 470-PIT | Santa Clara U., Ohlone Col | Free Agent | (MLB) |
| Jayson Werth | RF | Potomac (A+) Syracuse (AAA) Washington (MLB) | 6-5 | 210 | R-R | 1979-05-20 | 33 | Springfield,Illinois | MLB | 1997-2018 | 2002-2017 | 1997- 1- 22-BAL | Retired | - (MLB) | |
| Josh Wilkie | P | Syracuse (AAA) | 6-2 | 190 | R-R | 1984-07-22 | 27 | Clarkesville,Tennessee | AAA | 2003-2012 | - | George Washington U. | (MLB) | ||
| Deion Williams | P | GCL Nationals (Rk) | 6-3 | 208 | R-R | 1992-11-11 | 19 | Stone Mountain,Georgia | A | 2011-2015 | - | 2011-16- 487-WAS | Free Agent | (MLB) | |
| Kyle Winters | P | Potomac (A+) | 6-4 | 190 | R-R | 1987-04-22 | 25 | Denver,Colorado | AA | 2005-2012 | - | 2005- 5- 156-FLO | (MLB) | ||
| Rob Wort | P | Potomac (A+) | 6-2 | 170 | R-R | 1989-02-07 | 23 | St. Charles,Missouri | AA | 2008-2016 | - | 2009-30- 892-WAS | Jefferson Col | Free Agent | (MLB) |
| Ryan Zimmerman | 3B | Washington (MLB) | 6-2 | 210 | R-R | 1984-09-28 | 27 | Washington,North Carolina | MLB | 2003-2018 | 2005-2018 | 2005- 1- 4-WAS | Virginia | Active | Washington Nationals (MLB) |
| Jordan Zimmermann | P | Washington (MLB) | 6-2 | 200 | R-R | 1986-05-23 | 26 | Auburndale,Wisconsin | MLB | 2005-2018 | 2009-2018 | 2007- 2- 67-WAS | Wisconsin-Stevens Point | Active | Detroit Tigers (MLB) |
