| SP | Greinke, Z.Greinke, Zack >> | 21 | 2004 | R | 76 | 12 | 12 | 4 | 3 | 4.81 | .336 | 1.47 | 9.6 | 3.6 | 5.7 | 73.0 | 78 | 42 | 39 | 8 | 29 | 46 | 0 | 0 | 0 | 0 | 5 | 4 | 1 | 4.52 |
| SP | Radke, B.Radke, Brad # >> | 32 | 2004 | R | 69 | 12 | 12 | 6 | 4 | 3.52 | .253 | 0.98 | 7.3 | 1.5 | 5.3 | 76.2 | 62 | 30 | 30 | 14 | 13 | 45 | 2 | 0 | 0 | 0 | 8 | 3 | 0 | 4.84 |
| SP | Williams, W.Williams, Woody >> | 38 | 2004 | R | 44 | 12 | 12 | 2 | 8 | 5.90 | .348 | 1.59 | 10.3 | 4.1 | 6.4 | 68.2 | 78 | 46 | 45 | 9 | 31 | 48 | 0 | 0 | 0 | 0 | 3 | 1 | 4 | 4.72 |
| RP | Takatsu, S.Takatsu, Shingo >> | 36 | 2004 | R | 90 | 38 | 0 | 1 | 3 | 4.09 | .317 | 1.33 | 8.2 | 3.8 | 9.8 | 33.0 | 30 | 16 | 15 | 4 | 14 | 36 | 0 | 3 | 1 | 0 | 0 | 2 | 0 | 3.85 |
| RP | Dohmann, S.Dohmann, Scott >> | 26 | 2004 | R | 49 | 37 | 0 | 1 | 1 | 4.58 | .309 | 1.29 | 7.8 | 3.9 | 11.2 | 37.1 | 32 | 19 | 19 | 4 | 16 | 46 | 0 | 3 | 1 | 0 | 0 | 2 | 2 | 3.38 |
| SP | Mulder, M.Mulder, Mark >> | 27 | 2004 | L | 38 | 2 | 2 | 0 | 1 | 4.50 | .379 | 1.83 | 11.3 | 5.3 | 6.0 | 12.0 | 15 | 6 | 6 | 1 | 7 | 8 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 4.50 |