| SP | Schilling, C.Schilling, Curt >> | 37 | 2003 | R | 98 | 33 | 33 | 9 | 10 | 4.23 | .310 | 1.33 | 9.5 | 2.5 | 9.0 | 219.1 | 232 | 116 | 103 | 29 | 60 | 220 | 3 | 0 | 0 | 1 | 20 | 3 | 6 | 3.58 |
| SP | Redman, M.Redman, Mark # >> | 29 | 2003 | L | 80 | 32 | 32 | 14 | 10 | 4.24 | .296 | 1.23 | 8.7 | 2.4 | 5.0 | 199.2 | 193 | 99 | 94 | 23 | 52 | 111 | 1 | 0 | 0 | 0 | 19 | 7 | 1 | 4.28 |
| SP | Padilla, V.Padilla, Vicente >> | 26 | 2003 | R | 68 | 32 | 32 | 8 | 13 | 3.76 | .323 | 1.41 | 9.7 | 3.0 | 6.0 | 196.1 | 211 | 94 | 82 | 21 | 65 | 131 | 1 | 0 | 0 | 1 | 17 | 5 | 3 | 4.13 |
| SP | Williams, W.Williams, Woody # >> | 37 | 2003 | R | 57 | 32 | 32 | 14 | 9 | 4.77 | .338 | 1.50 | 10.2 | 3.3 | 6.2 | 196.1 | 223 | 110 | 104 | 24 | 71 | 134 | 1 | 0 | 0 | 0 | 16 | 7 | 2 | 4.42 |
| SP | Wakefield, T.Wakefield, Tim >> | 37 | 2003 | R | 47 | 30 | 30 | 10 | 12 | 6.28 | .364 | 1.66 | 11.3 | 3.6 | 6.6 | 156.1 | 196 | 118 | 109 | 23 | 63 | 114 | 0 | 0 | 0 | 0 | 11 | 9 | 10 | 4.84 |
| RP | Dotel, O.Dotel, Octavio >> | 30 | 2003 | R | 98 | 106 | 0 | 5 | 2 | 4.10 | .316 | 1.35 | 7.8 | 4.4 | 8.7 | 85.2 | 74 | 45 | 39 | 9 | 42 | 82 | 0 | 3 | 1 | 0 | 0 | 3 | 4 | 4.04 |
| RP | Guardado, E.Guardado, Eddie >> | 33 | 2003 | L | 87 | 111 | 0 | 2 | 4 | 4.52 | .307 | 1.30 | 8.2 | 3.6 | 6.7 | 67.2 | 61 | 39 | 34 | 9 | 27 | 50 | 0 | 4 | 3 | 0 | 0 | 2 | 2 | 4.55 |
| RP | Borowski, J.Borowski, Joe >> | 32 | 2003 | R | 81 | 94 | 0 | 5 | 4 | 4.67 | .323 | 1.41 | 8.8 | 3.9 | 6.7 | 81.0 | 79 | 44 | 42 | 15 | 35 | 60 | 0 | 10 | 7 | 0 | 0 | 2 | 0 | 5.30 |
| RP | Herges, M.Herges, Matt >> | 33 | 2003 | R | 60 | 26 | 0 | 2 | 1 | 4.35 | .333 | 1.45 | 9.0 | 4.5 | 9.9 | 20.2 | 20 | 16 | 10 | 2 | 10 | 22 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3.75 |
| RP | Shields, S.Shields, Scot >> | 28 | 2003 | R | 51 | 36 | 0 | 2 | 1 | 4.94 | .340 | 1.49 | 10.6 | 2.9 | 4.3 | 58.1 | 68 | 33 | 32 | 9 | 19 | 28 | 0 | 1 | 1 | 0 | 0 | 3 | 1 | 5.19 |