| SP | Burnett, A.Burnett, A.J. # >> | 27 | 2004 | R | 93 | 34 | 34 | 13 | 15 | 3.67 | .297 | 1.24 | 8.4 | 2.7 | 7.8 | 225.1 | 211 | 97 | 92 | 19 | 68 | 194 | 0 | 0 | 0 | 0 | 24 | 6 | 2 | 3.36 |
| SP | Greinke, Z.Greinke, Zack # >> | 21 | 2004 | R | 76 | 33 | 33 | 11 | 8 | 4.59 | .313 | 1.32 | 9.5 | 2.4 | 6.1 | 208.0 | 219 | 109 | 106 | 20 | 56 | 141 | 1 | 0 | 0 | 0 | 18 | 9 | 2 | 3.83 |
| SP | Mulder, M.Mulder, Mark >> | 27 | 2004 | L | 38 | 31 | 31 | 9 | 10 | 5.21 | .353 | 1.61 | 10.8 | 3.6 | 6.1 | 185.0 | 222 | 110 | 107 | 21 | 75 | 126 | 0 | 0 | 0 | 0 | 12 | 6 | 9 | 4.43 |
| RP | Rincon, J.Rincon, Juan >> | 25 | 2004 | R | 94 | 85 | 0 | 6 | 3 | 2.52 | .251 | 1.00 | 5.1 | 3.9 | 10.2 | 114.1 | 64 | 32 | 32 | 9 | 50 | 129 | 0 | 9 | 2 | 0 | 0 | 1 | 2 | 3.11 |
| RP | Alvarez, W.Alvarez, Wilson † >> | 34 | 2004 | L | 66 | 73 | 0 | 13 | 12 | 4.48 | .323 | 1.41 | 9.1 | 3.7 | 6.2 | 164.2 | 165 | 86 | 82 | 17 | 68 | 113 | 0 | 15 | 9 | 0 | 0 | 3 | 8 | 4.27 |
| RP | Leicester, J.Leicester, Jon >> | 25 | 2004 | R | 27 | 32 | 0 | 2 | 1 | 5.97 | .362 | 1.62 | 10.1 | 4.8 | 6.1 | 34.2 | 38 | 23 | 23 | 7 | 18 | 23 | 0 | 3 | 0 | 0 | 0 | 3 | 0 | 6.18 |
| SP | Willis, D.Willis, Dontrelle >> | 22 | 2004 | L | 27 | 0 | 0 | 0 | 0 | - | .000 | - | - | - | - | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
| SP | Colon, B.Colon, Bartolo >> | 31 | 2004 | R | 37 | 1 | 0 | 0 | 0 | 0.00 | .286 | 1.20 | 0.0 | 18.0 | 0.0 | 1.2 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 9.00 |