| Year | Rnd | Ovl | Phase | Player | Drafting Team | Pos | HiLvl | Played | Src | Drafted From | SF | State | AB | 2B | 3B | HR | RBI | SB | BAVG | W | L | ERA | SV | IP | SO | GS |
| 2003 | 2 | 59 | June-Reg | Jason Hirsh | Houston Astros | P | MLB | 2003-2010 | C | California Lutheran University | SF | CA | 50 | 0 | 0 | 0 | 2 | 0 | .060 | 8 | 11 | 5.32 | 0 | 166 | 110 | 29 |
| 2003 | 3 | 89 | June-Reg | Drew Stubbs ** | Houston Astros | OF | MLB | 2004-2013 | H | Atlanta (Atlanta,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 4 | 119 | June-Reg | Josh Anderson | Houston Astros | OF | MLB | 2002-2010 | C | Eastern Kentucky University | SF | KY | 486 | 17 | 5 | 4 | 47 | 36 | .272 | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 5 | 149 | June-Reg | Josh Muecke | Houston Astros | P | AAA | 2001-2011 | C | Loyola Marymount University | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 6 | 179 | June-Reg | Cliff Davis | Houston Astros | P | A- | 2003-2005 | H | Eupora (Eupora,MS) | SF | MS | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 7 | 209 | June-Reg | Jeff Jorgensen | Houston Astros | OF | NCAA | 2003-2003 | C | Rice University | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 8 | 239 | June-Reg | Mike Collar | Houston Astros | P | A | 2001-2005 | C | University of Maine | SF | ME | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 9 | 269 | June-Reg | Brock Koman | Houston Astros | 3B | A | 2000-2004 | C | University of Michigan | SF | MI | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 10 | 299 | June-Reg | Beau Hearod | Houston Astros | OF | A | 2000-2004 | C | University of Alabama | SF | AL | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 11 | 329 | June-Reg | Nick Green ** | Houston Astros | P | AAA | 2004-2012 | C | Darton College | SF | GA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 12 | 359 | June-Reg | Wade Robinson | Houston Astros | SS | AAA | 2000-2008 | C | Louisiana Tech University | SF | LA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 13 | 389 | June-Reg | Jimmy Barthmaier | Houston Astros | P | MLB | 2003-2012 | H | Roswell (Roswell,GA) | SF | GA | 3 | 0 | 0 | 0 | 0 | 0 | .000 | 0 | 2 | 10.45 | 0 | 10 | 6 | 3 |
| 2003 | 14 | 419 | June-Reg | Michael Dunn ** | Houston Astros | OF | MLB | 2004-2013 | H | Cimarron Memorial (Las Vegas,NV) | SF | NV | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 15 | 449 | June-Reg | Bo Edmiston | Houston Astros | P | A- | 2003-2005 | C | Mississippi College | SF | MS | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 16 | 479 | June-Reg | Jamie Merchant | Houston Astros | P | AA | 2002-2007 | C | University of Vermont | SF | VT | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 17 | 509 | June-Reg | Pat O'Brien | Houston Astros | C | A- | 2000-2008 | C | Kent State University | SF | OH | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 18 | 539 | June-Reg | Kevin Vital | Houston Astros | 1B | A | 2003-2005 | C | Southern University | SF | LA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 19 | 569 | June-Reg | Edwin Maysonet | Houston Astros | 2B | MLB | 2002-2013 | C | Delta State University | SF | MS | 136 | 3 | 1 | 2 | 11 | 1 | .265 | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 20 | 599 | June-Reg | Brian Skaug | Houston Astros | 2B | A+ | 2003-2004 | C | California Lutheran University | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 21 | 629 | June-Reg | Kerri Fair | Houston Astros | OF | A- | 2003-2003 | C | Jacksonville State University | SF | AL | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 22 | 659 | June-Reg | Lance Koenig | Houston Astros | 2B | A- | 2003-2008 | C | Monmouth College | SF | IL | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 23 | 689 | June-Reg | Mark Saccomanno | Houston Astros | 3B | MLB | 1999-2010 | C | Baylor University | SF | TX | 10 | 1 | 0 | 1 | 2 | 0 | .200 | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 24 | 719 | June-Reg | Ryan Yurek | Houston Astros | P | A- | 2003-2004 | C | Loyola Marymount University | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 25 | 749 | June-Reg | Mario Garza | Houston Astros | C | A+ | 2000-2007 | C | University of Florida | SF | FL | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 26 | 779 | June-Reg | Rob Ramsey | Houston Astros | P | A | 2001-2004 | C | Texas A&M University | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 27 | 809 | June-Reg | Omar Arif ** | Houston Astros | P | A- | 2004-2007 | H | Poteet (Mesquite,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 28 | 839 | June-Reg | Chad Prosser | Houston Astros | SS | A | 2000-2004 | C | University of North Carolina | SF | NC | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 29 | 869 | June-Reg | Jason Corapci | Houston Astros | 2B | RK | 2000-2005 | C | Cal State Fullerton | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 30 | 899 | June-Reg | Scott Bradley | Houston Astros | 2B | NCAA | 2004-2006 | C | Chabot College | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 31 | 929 | June-Reg | Spike McDougall ** | Houston Astros | SS | AA | 2006-2009 | C | Diablo Valley College | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 32 | 959 | June-Reg | Justin O'Bannon ** | Houston Astros | P | - | H | Kingwood (Kingwood,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| 2003 | 33 | 989 | June-Reg | Michael Walls | Houston Astros | 3B | A- | 2002-2004 | C | Saint Joseph's University | SF | PA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 34 | 1019 | June-Reg | Shawn Burris | Houston Astros | P | - | H | Poteet (Mesquite,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| 2003 | 35 | 1049 | June-Reg | John Slusarz ** | Houston Astros | P | A+ | 2005-2010 | C | University of Connecticut-Avery Point | SF | CT | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 36 | 1079 | June-Reg | Logan Ondrusek ** | Houston Astros | P | MLB | 2004-2013 | H | St. Paul (Shiner,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 37 | 1109 | June-Reg | Ethien Santana ** | Houston Astros | OF | A+ | 2004-2007 | C | Laredo Community College | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 38 | 1139 | June-Reg | Victor Ferrante ** | Houston Astros | P | A+ | 2006-2012 | H | Benicia (Benicia,CA) | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 39 | 1169 | June-Reg | Josh Smith ** | Houston Astros | P | - | C | Riverside Community College | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| 2003 | 40 | 1199 | June-Reg | David Roberts | Houston Astros | OF | - | H | The Woodlands (The Woodlands,TX) | SF | TX | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| 2003 | 41 | 1229 | June-Reg | Ray Stokes ** | Houston Astros | 2B | A | 2006-2011 | H | San Leandro (San Leandro,CA) | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2003 | 42 | 1258 | June-Reg | Shane Buschini ** | Houston Astros | 1B | A | 2004-2008 | H | California (San Ramon,CA) | SF | CA | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |