| SP | Johnson, R.Johnson, Randy >> | 41 | 2004 | L | 100 | 36 | 36 | 17 | 12 | 3.32 | .274 | 1.11 | 7.9 | 2.1 | 8.8 | 249.2 | 219 | 92 | 92 | 19 | 59 | 243 | 7 | 0 | 0 | 2 | 26 | 4 | 3 | 2.80 |
| SP | Harden, R.Harden, Rich # >> | 23 | 2004 | R | 63 | 33 | 33 | 16 | 5 | 3.77 | .308 | 1.31 | 8.6 | 3.2 | 6.3 | 200.1 | 190 | 91 | 84 | 21 | 72 | 141 | 0 | 0 | 0 | 0 | 22 | 5 | 4 | 4.11 |
| SP | Clement, M.Clement, Matt >> | 30 | 2004 | R | 83 | 33 | 33 | 11 | 14 | 5.08 | .344 | 1.54 | 8.7 | 5.1 | 8.5 | 179.0 | 174 | 104 | 101 | 28 | 102 | 170 | 1 | 0 | 0 | 1 | 15 | 6 | 7 | 4.94 |
| CL | Gagne, E.Gagne, Eric † >> | 28 | 2004 | R | 97 | 69 | 0 | 9 | 9 | 3.01 | .287 | 1.19 | 7.9 | 2.9 | 9.2 | 74.2 | 65 | 25 | 25 | 9 | 24 | 76 | 0 | 41 | 6 | 0 | 0 | 1 | 0 | 3.54 |
| RP | Linebrink, S.Linebrink, Scott >> | 28 | 2004 | R | 89 | 97 | 0 | 7 | 2 | 2.38 | .281 | 1.12 | 6.9 | 3.2 | 5.8 | 139.2 | 107 | 39 | 37 | 11 | 50 | 90 | 0 | 3 | 4 | 0 | 0 | 7 | 3 | 3.96 |
| RP | Foulke, K.Foulke, Keith >> | 32 | 2004 | R | 87 | 76 | 0 | 2 | 2 | 3.22 | .255 | 1.00 | 7.1 | 1.9 | 5.9 | 106.1 | 84 | 38 | 38 | 11 | 22 | 70 | 0 | 2 | 5 | 0 | 0 | 3 | 2 | 3.74 |
| RP | Rivera, M.Rivera, Mariano >> | 35 | 2004 | R | 79 | 59 | 0 | 5 | 3 | 2.95 | .299 | 1.24 | 7.4 | 3.8 | 6.5 | 73.1 | 60 | 24 | 24 | 5 | 31 | 53 | 0 | 3 | 2 | 0 | 0 | 3 | 0 | 3.84 |
| RP | Aquino, G.Aquino, Greg >> | 26 | 2004 | R | 80 | 47 | 0 | 2 | 3 | 4.25 | .315 | 1.32 | 7.6 | 4.2 | 6.1 | 53.0 | 45 | 27 | 25 | 5 | 25 | 36 | 0 | 1 | 1 | 0 | 0 | 3 | 6 | 4.45 |
| RP | Bottalico, R.Bottalico, Ricky >> | 35 | 2004 | R | 57 | 30 | 0 | 2 | 0 | 1.73 | .216 | 0.83 | 4.5 | 3.0 | 8.3 | 36.1 | 18 | 8 | 7 | 2 | 12 | 33 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2.89 |
| RP | Urbina, U.Urbina, Ugueth >> | 30 | 2004 | R | 63 | 25 | 0 | 3 | 1 | 5.26 | .353 | 1.64 | 6.8 | 8.3 | 7.2 | 25.2 | 19 | 15 | 15 | 3 | 23 | 20 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 5.72 |