2003 Big 12 Conference Baseball Tournament
The 2003 Big 12 Conference Baseball Tournament was once again held at AT&T Bricktown Ballpark in Oklahoma City, OK from May 21 through May 25. Texas won their second consecutive tournament and earned the Big 12 Conference's automatic bid to the 2003 NCAA Division I Baseball Tournament. The tournament mirrored the format of the College World Series, with two 4-team double-elimination brackets and a final championship game.Source:
| Place | Seed | Team | Conference | Conference | Conference | Conference | Overall | Overall | Overall |
| Place | Seed | Team | W | L | % | GB | W | L | % |
| 1 | 1 | | 20 | 7 | | – | 47 | 18 | |
| 2 | 2 | | 19 | 8 | | 1 | 45 | 19 | |
| 2 | 3 | | 19 | 8 | | 1 | 50 | 20 | |
| 4 | 4 | Missouri | 15 | 11 | | 4.5 | 36 | 22 | |
| 5 | 5 | | 15 | 12 | | 5 | 45 | 23 | |
| 6 | 6 | | 14 | 13 | | 6 | 34 | 24 | |
| 7 | 7 | | 10 | 17 | | 10 | 23 | 31 | |
| 8 | 8 | | 9 | 18 | | 11 | 35 | 28 | |
| 9 | – | | 8 | 18 | | 11.5 | 30 | 25 | |
| 10 | – | | 5 | 22 | | 15 | 15 | 37 | |
- Colorado and Iowa State did not sponsor baseball teams.
- * indicates extra-inning game.
- Kansas State and Texas Tech did not make the tournament.
All-Tournament team
