| SP | Schmidt, J.Schmidt, Jason >> | 30 | 2003 | R | 100 | 14 | 14 | 3 | 4 | 4.53 | .306 | 1.29 | 9.1 | 2.6 | 8.8 | 95.1 | 96 | 50 | 48 | 15 | 27 | 93 | 1 | 0 | 0 | 0 | 8 | 3 | 5 | 4.04 |
| SP | Clemens, R.Clemens, Roger # >> | 41 | 2003 | R | 78 | 14 | 14 | 5 | 8 | 5.23 | .281 | 1.14 | 8.7 | 1.6 | 8.5 | 96.1 | 93 | 57 | 56 | 15 | 17 | 91 | 1 | 0 | 0 | 0 | 6 | 3 | 2 | 3.76 |
| SP | Hernandez, L.Hernandez, Livan >> | 28 | 2003 | R | 72 | 13 | 13 | 3 | 9 | 6.67 | .358 | 1.64 | 10.8 | 4.1 | 7.6 | 82.1 | 98 | 65 | 61 | 13 | 37 | 69 | 1 | 0 | 0 | 0 | 5 | 3 | 3 | 4.84 |
| SP | Williams, W.Williams, Woody >> | 37 | 2003 | R | 57 | 13 | 13 | 6 | 5 | 4.63 | .338 | 1.46 | 10.0 | 3.3 | 6.1 | 83.2 | 92 | 45 | 43 | 19 | 30 | 56 | 0 | 0 | 0 | 0 | 6 | 6 | 2 | 5.93 |
| CL | Smoltz, J.Smoltz, John >> | 36 | 2003 | R | 93 | 28 | 0 | 1 | 5 | 3.12 | .264 | 1.08 | 8.7 | 1.0 | 8.7 | 26.0 | 25 | 10 | 9 | 4 | 3 | 25 | 0 | 12 | 1 | 0 | 0 | 0 | 0 | 3.42 |
| SU | Guardado, E.Guardado, Eddie >> | 33 | 2003 | L | 87 | 24 | 0 | 2 | 1 | 4.81 | .311 | 1.32 | 10.1 | 1.9 | 8.3 | 24.1 | 27 | 13 | 13 | 4 | 5 | 22 | 0 | 3 | 2 | 0 | 0 | 1 | 1 | 4.08 |
| RP | Borowski, J.Borowski, Joe >> | 32 | 2003 | R | 81 | 34 | 0 | 1 | 0 | 4.76 | .309 | 1.34 | 9.6 | 2.6 | 5.1 | 28.1 | 30 | 16 | 15 | 5 | 8 | 16 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 5.04 |
| RP | Koplove, M.Koplove, Mike >> | 27 | 2003 | R | 70 | 31 | 0 | 2 | 1 | 5.68 | .303 | 1.26 | 9.4 | 2.2 | 5.0 | 25.1 | 26 | 16 | 16 | 4 | 6 | 14 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 4.80 |
| RP | Embree, A.Embree, Alan >> | 33 | 2003 | L | 61 | 30 | 0 | 0 | 0 | 3.91 | .330 | 1.39 | 10.6 | 2.0 | 7.8 | 23.0 | 27 | 11 | 10 | 3 | 5 | 20 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 3.87 |
| SP | Pavano, C.Pavano, Carl >> | 27 | 2003 | R | 46 | 2 | 1 | 0 | 0 | 3.86 | .344 | 1.57 | 6.4 | 7.7 | 7.7 | 7.0 | 5 | 3 | 3 | 0 | 6 | 6 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3.86 |
| RP | Ramirez, E.Ramirez, Erasmo >> | 27 | 2003 | L | 55 | 24 | 0 | 2 | 0 | 3.47 | .271 | 1.03 | 7.4 | 2.0 | 8.2 | 23.1 | 19 | 9 | 9 | 3 | 5 | 21 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 3.78 |