| SP | Santana, J.Santana, Johan >> | 25 | 2004 | L | 99 | 19 | 19 | 7 | 8 | 4.79 | .306 | 1.29 | 8.9 | 2.8 | 9.2 | 114.2 | 113 | 64 | 61 | 18 | 35 | 116 | 1 | 0 | 0 | 1 | 10 | 4 | 4 | 4.04 |
| SP | Hernandez, L.Hernandez, Livan >> | 29 | 2004 | R | 81 | 19 | 19 | 7 | 9 | 4.65 | .353 | 1.60 | 11.0 | 3.5 | 7.1 | 120.0 | 146 | 67 | 62 | 14 | 46 | 94 | 0 | 0 | 0 | 0 | 10 | 4 | 3 | 4.20 |
| SP | Rusch, G.Rusch, Glendon >> | 30 | 2004 | L | 73 | 18 | 18 | 1 | 7 | 7.49 | .392 | 1.88 | 14.2 | 2.9 | 6.4 | 69.2 | 109 | 60 | 58 | 11 | 22 | 49 | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 4.78 |
| SP | Weaver, J.Weaver, Jeff † >> | 28 | 2004 | R | 51 | 19 | 17 | 12 | 4 | 4.18 | .323 | 1.39 | 8.7 | 3.8 | 6.4 | 118.1 | 114 | 58 | 55 | 19 | 50 | 84 | 1 | 0 | 0 | 0 | 8 | 5 | 1 | 5.07 |
| RP | Aquino, G.Aquino, Greg >> | 26 | 2004 | R | 80 | 47 | 0 | 4 | 0 | 3.57 | .289 | 1.21 | 5.2 | 5.7 | 6.6 | 68.0 | 39 | 27 | 27 | 7 | 43 | 50 | 0 | 2 | 1 | 0 | 0 | 1 | 6 | 4.81 |
| RP | Smoltz, J.Smoltz, John >> | 37 | 2004 | R | 75 | 41 | 0 | 0 | 1 | 2.01 | .222 | 0.86 | 6.5 | 1.4 | 10.0 | 53.2 | 38 | 12 | 12 | 4 | 8 | 59 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 2.21 |
| RP | Osuna, A.Osuna, Antonio >> | 31 | 2004 | R | 62 | 40 | 0 | 4 | 0 | 4.75 | .352 | 1.56 | 9.7 | 4.6 | 8.8 | 41.2 | 44 | 22 | 22 | 7 | 21 | 40 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 5.02 |
| RP | Romero, J.Romero, J.C. >> | 28 | 2004 | L | 50 | 35 | 0 | 4 | 0 | 3.73 | .293 | 1.20 | 6.8 | 4.0 | 6.8 | 41.0 | 31 | 17 | 17 | 6 | 18 | 31 | 0 | 2 | 0 | 0 | 0 | 2 | 2 | 4.85 |
| CL | Calero, K.Calero, Kiko † >> | 29 | 2004 | R | 100 | 42 | 0 | 3 | 3 | 4.64 | .308 | 1.29 | 7.1 | 4.7 | 9.0 | 42.2 | 33 | 22 | 22 | 6 | 22 | 42 | 0 | 22 | 5 | 0 | 0 | 2 | 1 | 4.57 |
| SU | Donnelly, B.Donnelly, Brendan >> | 33 | 2004 | R | 82 | 45 | 0 | 3 | 1 | 5.04 | .336 | 1.42 | 9.2 | 3.6 | 8.5 | 50.0 | 51 | 28 | 28 | 6 | 20 | 47 | 0 | 2 | 2 | 0 | 0 | 5 | 0 | 4.18 |