| SP | Harden, R.Harden, Rich # >> | 23 | 2004 | R | 54 | 35 | 35 | 8 | 12 | 5.63 | .326 | 1.45 | 9.3 | 3.8 | 5.6 | 163.0 | 168 | 105 | 102 | 27 | 68 | 101 | 0 | 0 | 0 | 0 | 7 | 1 | 4 | 5.18 |
| SP | Pavano, C.Pavano, Carl >> | 28 | 2004 | R | 77 | 35 | 35 | 10 | 11 | 4.15 | .286 | 1.18 | 8.7 | 2.0 | 5.8 | 212.2 | 204 | 107 | 98 | 31 | 48 | 136 | 2 | 0 | 0 | 2 | 20 | 4 | 3 | 4.35 |
| SP | Lopez, R.Lopez, Rodrigo >> | 29 | 2004 | R | 56 | 33 | 33 | 7 | 12 | 4.64 | .318 | 1.36 | 8.5 | 3.8 | 6.2 | 149.1 | 140 | 80 | 77 | 22 | 63 | 102 | 0 | 0 | 0 | 0 | 6 | 6 | 6 | 4.94 |
| SP | Weaver, J.Weaver, Jeff >> | 28 | 2004 | R | 45 | 34 | 33 | 12 | 13 | 6.01 | .331 | 1.46 | 9.3 | 3.9 | 7.1 | 158.2 | 163 | 118 | 106 | 31 | 68 | 125 | 0 | 0 | 1 | 0 | 6 | 5 | 2 | 5.35 |
| RP | Calero, K.Calero, Kiko >> | 29 | 2004 | R | 99 | 88 | 0 | 8 | 4 | 3.06 | .270 | 1.10 | 6.9 | 3.1 | 9.1 | 123.2 | 94 | 42 | 42 | 15 | 42 | 125 | 0 | 9 | 4 | 0 | 0 | 1 | 1 | 3.60 |
| RP | Lidge, B.Lidge, Brad † >> | 28 | 2004 | R | 97 | 90 | 0 | 9 | 0 | 1.94 | .229 | 0.88 | 4.9 | 3.0 | 11.6 | 130.0 | 71 | 30 | 28 | 10 | 44 | 167 | 0 | 6 | 4 | 0 | 0 | 1 | 1 | 2.47 |
| RP | Rodriguez, F.Rodriguez, Francisco † >> | 22 | 2004 | R | 93 | 79 | 0 | 11 | 2 | 3.51 | .292 | 1.19 | 7.1 | 3.6 | 9.3 | 105.0 | 83 | 41 | 41 | 16 | 42 | 108 | 0 | 8 | 6 | 0 | 0 | 5 | 2 | 4.27 |
| RP | Takatsu, S.Takatsu, Shingo >> | 36 | 2004 | R | 88 | 61 | 0 | 4 | 2 | 1.79 | .265 | 1.07 | 6.2 | 3.5 | 6.5 | 80.1 | 55 | 17 | 16 | 4 | 31 | 58 | 0 | 6 | 1 | 0 | 0 | 1 | 0 | 3.40 |
| RP | Harper, T.Harper, Travis >> | 28 | 2004 | R | 56 | 13 | 0 | 1 | 1 | 4.50 | .310 | 1.35 | 6.3 | 5.9 | 5.4 | 20.0 | 14 | 11 | 10 | 3 | 13 | 12 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 5.70 |