| SP | Santana, J.Santana, Johan >> | 24 | 2003 | L | 97 | 23 | 23 | 1 | 5 | 4.36 | .328 | 1.39 | 9.3 | 3.3 | 9.2 | 88.2 | 91 | 45 | 43 | 9 | 32 | 90 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 3.61 |
| SP | Clement, M.Clement, Matt >> | 29 | 2003 | R | 83 | 23 | 23 | 7 | 10 | 4.31 | .322 | 1.39 | 9.1 | 3.4 | 6.0 | 142.0 | 143 | 68 | 68 | 10 | 54 | 95 | 1 | 0 | 0 | 0 | 13 | 5 | 8 | 3.82 |
| SP | Gonzalez, G.Gonzalez, Geremi >> | 28 | 2003 | R | 65 | 22 | 22 | 7 | 9 | 4.87 | .364 | 1.64 | 9.3 | 5.5 | 5.9 | 133.0 | 137 | 74 | 72 | 19 | 81 | 87 | 0 | 0 | 0 | 0 | 10 | 10 | 4 | 5.60 |
| SP | Maddux, G.Maddux, Greg # >> | 37 | 2003 | R | 60 | 22 | 22 | 10 | 5 | 4.20 | .303 | 1.26 | 9.9 | 1.5 | 5.7 | 143.2 | 157 | 68 | 67 | 17 | 24 | 90 | 2 | 0 | 0 | 1 | 14 | 6 | 1 | 3.92 |
| RP | Valverde, J.Valverde, Jose >> | 24 | 2003 | R | 97 | 57 | 0 | 6 | 3 | 4.14 | .345 | 1.54 | 7.8 | 6.1 | 10.2 | 78.1 | 68 | 36 | 36 | 9 | 53 | 88 | 0 | 3 | 2 | 0 | 0 | 3 | 5 | 4.40 |
| RP | Timlin, M.Timlin, Mike # >> | 37 | 2003 | R | 69 | 48 | 0 | 3 | 5 | 5.37 | .309 | 1.33 | 9.9 | 2.1 | 7.1 | 60.1 | 66 | 36 | 36 | 11 | 14 | 47 | 0 | 2 | 3 | 0 | 0 | 1 | 0 | 4.57 |
| RP | Villarreal, O.Villarreal, Oscar >> | 22 | 2003 | R | 52 | 42 | 0 | 0 | 1 | 6.59 | .356 | 1.63 | 10.1 | 4.6 | 8.1 | 41.0 | 46 | 30 | 30 | 12 | 21 | 37 | 0 | 4 | 3 | 0 | 0 | 1 | 0 | 6.61 |
| RP | Lopez, J.Lopez, Javier >> | 26 | 2003 | L | 41 | 38 | 0 | 3 | 2 | 7.02 | .369 | 1.76 | 12.5 | 3.3 | 6.8 | 41.0 | 57 | 33 | 32 | 7 | 15 | 31 | 0 | 4 | 0 | 0 | 0 | 0 | 1 | 4.80 |
| SP | Perez, O.Perez, Odalis >> | 26 | 2003 | L | 39 | 0 | 0 | 0 | 0 | - | .000 | - | - | - | - | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
| SP | Thomson, J.Thomson, John >> | 30 | 2003 | R | 29 | 0 | 0 | 0 | 0 | - | .000 | - | - | - | - | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
| SP | Anderson, B.Anderson, Brian >> | 31 | 2003 | L | 28 | 16 | 0 | 4 | 1 | 5.57 | .364 | 1.67 | 12.9 | 2.1 | 8.1 | 21.0 | 30 | 13 | 13 | 3 | 5 | 19 | 0 | 2 | 1 | 0 | 0 | 1 | 1 | 3.90 |