| SP | Moyer, J.Moyer, Jamie # >> | 41 | 2003 | L | 70 | 14 | 14 | 8 | 3 | 4.08 | .287 | 1.18 | 8.2 | 2.4 | 5.8 | 92.2 | 84 | 43 | 42 | 11 | 25 | 59 | 0 | 0 | 0 | 0 | 7 | 3 | 0 | 4.18 |
| SP | Burkett, J.Burkett, John >> | 39 | 2003 | R | 8 | 8 | 8 | 4 | 1 | 4.95 | .322 | 1.38 | 10.4 | 2.0 | 5.0 | 40.0 | 46 | 23 | 22 | 7 | 9 | 22 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 5.00 |
| CL | Hawkins, L.Hawkins, LaTroy >> | 31 | 2003 | R | 70 | 35 | 0 | 3 | 1 | 1.47 | .236 | 0.87 | 6.0 | 2.0 | 6.0 | 36.2 | 24 | 11 | 6 | 0 | 8 | 24 | 0 | 5 | 0 | 0 | 0 | 2 | 3 | 2.50 |
| RP | Soriano, R.Soriano, Rafael >> | 24 | 2003 | R | 100 | 25 | 0 | 2 | 1 | 3.96 | .279 | 1.12 | 6.5 | 3.6 | 7.9 | 25.0 | 18 | 12 | 11 | 3 | 10 | 22 | 0 | 2 | 2 | 0 | 0 | 1 | 0 | 4.12 |
| RP | Cressend, J.Cressend, Jack >> | 28 | 2003 | R | 57 | 23 | 0 | 1 | 1 | 3.13 | .355 | 1.57 | 9.8 | 4.3 | 5.1 | 23.0 | 25 | 8 | 8 | 2 | 11 | 13 | 0 | 0 | 2 | 0 | 0 | 2 | 1 | 4.70 |
| RP | Fuentes, B.Fuentes, Brian >> | 28 | 2003 | L | 50 | 33 | 0 | 2 | 0 | 4.59 | .338 | 1.53 | 8.5 | 5.5 | 6.5 | 33.1 | 31 | 20 | 17 | 7 | 20 | 24 | 0 | 1 | 2 | 0 | 0 | 0 | 1 | 6.12 |
| RP | Marte, D.Marte, Damaso >> | 28 | 2003 | L | 90 | 17 | 0 | 0 | 2 | 5.29 | .354 | 1.59 | 9.5 | 4.8 | 6.4 | 17.0 | 18 | 10 | 10 | 1 | 9 | 12 | 0 | 9 | 2 | 0 | 0 | 1 | 1 | 4.12 |
| RP | de los Santos, V.de los Santos, Valerio >> | 31 | 2003 | L | 36 | 12 | 0 | 0 | 0 | 2.70 | .412 | 2.10 | 12.0 | 9.0 | 6.0 | 6.2 | 8 | 2 | 2 | 1 | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.83 |
| RP | Donnelly, B.Donnelly, Brendan >> | 32 | 2003 | R | 83 | 19 | 0 | 0 | 2 | 4.67 | .316 | 1.33 | 9.0 | 3.2 | 9.5 | 17.1 | 17 | 10 | 9 | 2 | 6 | 18 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3.65 |
| RP | Schoeneweis, S.Schoeneweis, Scott >> | 30 | 2003 | L | 40 | 15 | 0 | 1 | 0 | 5.17 | .373 | 1.79 | 12.6 | 4.2 | 6.6 | 15.2 | 21 | 11 | 9 | 0 | 7 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.93 |