| SP | Morris, M.Morris, Matt >> | 29 | 2003 | R | 77 | 23 | 23 | 5 | 11 | 6.61 | .354 | 1.58 | 11.1 | 3.2 | 6.0 | 125.1 | 154 | 92 | 92 | 23 | 44 | 84 | 0 | 0 | 0 | 0 | 8 | 8 | 1 | 5.30 |
| SP | Villone, R.Villone, Ron # >> | 33 | 2003 | L | 63 | 22 | 22 | 10 | 3 | 4.03 | .321 | 1.38 | 8.3 | 4.1 | 7.1 | 120.2 | 111 | 57 | 54 | 15 | 55 | 94 | 0 | 0 | 0 | 0 | 8 | 5 | 2 | 4.56 |
| SP | Ponson, S.Ponson, Sidney # >> | 27 | 2003 | R | 53 | 22 | 22 | 3 | 8 | 5.21 | .341 | 1.52 | 10.3 | 3.5 | 5.6 | 134.2 | 153 | 78 | 78 | 21 | 52 | 83 | 1 | 0 | 0 | 1 | 11 | 4 | 8 | 5.05 |
| SP | Garcia, F.Garcia, Freddy >> | 28 | 2003 | R | 35 | 22 | 22 | 6 | 8 | 4.41 | .330 | 1.45 | 9.1 | 4.0 | 6.9 | 132.2 | 134 | 66 | 65 | 20 | 58 | 101 | 0 | 0 | 0 | 0 | 9 | 4 | 2 | 4.85 |
| RP | Foulke, K.Foulke, Keith >> | 31 | 2003 | R | 96 | 69 | 0 | 5 | 1 | 3.81 | .287 | 1.14 | 7.8 | 2.4 | 9.9 | 78.0 | 68 | 33 | 33 | 8 | 21 | 86 | 0 | 1 | 7 | 0 | 0 | 5 | 0 | 3.13 |
| RP | Borowski, J.Borowski, Joe † >> | 32 | 2003 | R | 81 | 63 | 0 | 8 | 4 | 2.87 | .289 | 1.22 | 6.7 | 4.3 | 6.8 | 69.0 | 51 | 24 | 22 | 10 | 33 | 52 | 0 | 6 | 3 | 0 | 0 | 0 | 0 | 4.81 |
| RP | Walker, J.Walker, Jamie >> | 32 | 2003 | L | 47 | 79 | 0 | 3 | 2 | 4.11 | .305 | 1.28 | 8.2 | 3.3 | 6.8 | 57.0 | 52 | 26 | 26 | 7 | 21 | 43 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 4.30 |
| RP | Nelson, J.Nelson, Jeff >> | 37 | 2003 | R | 37 | 51 | 0 | 5 | 2 | 3.31 | .300 | 1.23 | 8.7 | 2.5 | 11.0 | 54.1 | 52 | 20 | 20 | 7 | 15 | 66 | 0 | 10 | 2 | 0 | 0 | 3 | 3 | 3.24 |
| SP | Trachsel, S.Trachsel, Steve >> | 33 | 2003 | R | 27 | 2 | 0 | 1 | 0 | 9.00 | .526 | 3.33 | 15.0 | 15.0 | 9.0 | 3.0 | 5 | 3 | 3 | 0 | 5 | 3 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 6.00 |
| SP | Johnson, R.Johnson, Randy >> | 40 | 2003 | L | 23 | 15 | 0 | 0 | 3 | 12.96 | .490 | 2.88 | 17.4 | 9.6 | 6.2 | 16.2 | 31 | 24 | 24 | 4 | 17 | 11 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 8.06 |