| SP | Carpenter, C.Carpenter, Chris >> | 29 | 2004 | R | 71 | 36 | 36 | 16 | 14 | 4.21 | .293 | 1.22 | 8.5 | 2.5 | 6.6 | 241.2 | 228 | 117 | 113 | 36 | 67 | 178 | 5 | 0 | 0 | 3 | 15 | 5 | 7 | 4.36 |
| SP | Morris, M.Morris, Matt >> | 30 | 2004 | R | 33 | 35 | 35 | 14 | 13 | 4.43 | .295 | 1.23 | 8.6 | 2.6 | 6.8 | 225.1 | 214 | 114 | 111 | 29 | 64 | 169 | 2 | 0 | 0 | 0 | 18 | 5 | 8 | 4.09 |
| SP | Williams, W.Williams, Woody >> | 38 | 2004 | R | 28 | 35 | 35 | 17 | 10 | 4.41 | .295 | 1.23 | 8.8 | 2.3 | 6.1 | 224.2 | 220 | 114 | 110 | 39 | 56 | 151 | 1 | 0 | 0 | 1 | 18 | 6 | 8 | 4.75 |
| SP | Suppan, J.Suppan, Jeff >> | 29 | 2004 | R | 22 | 23 | 23 | 9 | 6 | 3.61 | .300 | 1.25 | 8.5 | 2.8 | 5.2 | 149.2 | 140 | 63 | 60 | 11 | 47 | 86 | 1 | 0 | 0 | 1 | 13 | 5 | 3 | 3.85 |
| RP | Isringhausen, J.Isringhausen, Jason >> | 32 | 2004 | R | 81 | 103 | 0 | 3 | 3 | 3.48 | .295 | 1.20 | 7.3 | 3.5 | 7.5 | 85.1 | 69 | 34 | 33 | 4 | 33 | 71 | 0 | 2 | 2 | 0 | 0 | 5 | 1 | 3.28 |
| CL | Calero, K.Calero, Kiko >> | 29 | 2004 | R | 96 | 63 | 0 | 7 | 5 | 1.94 | .220 | 0.81 | 5.4 | 1.9 | 8.9 | 74.1 | 44 | 16 | 16 | 5 | 16 | 73 | 0 | 40 | 3 | 0 | 0 | 3 | 0 | 2.68 |
| RP | Tavarez, J.Tavarez, Julian >> | 31 | 2004 | R | 52 | 72 | 0 | 1 | 0 | 3.36 | .302 | 1.26 | 8.0 | 3.4 | 8.5 | 56.1 | 50 | 21 | 21 | 5 | 21 | 53 | 0 | 1 | 2 | 0 | 0 | 2 | 2 | 3.50 |
| SP | Marquis, J.Marquis, Jason >> | 26 | 2004 | R | 16 | 38 | 0 | 11 | 4 | 3.47 | .298 | 1.25 | 7.7 | 3.6 | 6.5 | 124.1 | 106 | 48 | 48 | 13 | 49 | 90 | 0 | 0 | 0 | 0 | 0 | 3 | 4 | 4.17 |