| SP | Schmidt, J.Schmidt, Jason $ >> | 30 | 2003 | R | 100 | 9 | 9 | 3 | 3 | 4.50 | .331 | 1.43 | 8.7 | 4.2 | 9.6 | 58.0 | 56 | 29 | 29 | 6 | 27 | 62 | 1 | 0 | 0 | 1 | 5 | 3 | 0 | 3.76 |
| SP | Halladay, R.Halladay, Roy >> | 26 | 2003 | R | 85 | 9 | 9 | 3 | 5 | 5.04 | .359 | 1.63 | 12.1 | 2.6 | 7.5 | 55.1 | 74 | 36 | 31 | 11 | 16 | 46 | 1 | 0 | 0 | 1 | 4 | 3 | 2 | 4.96 |
| SP | Zambrano, C.Zambrano, Carlos >> | 22 | 2003 | R | 55 | 8 | 8 | 3 | 1 | 6.25 | .350 | 1.59 | 9.2 | 5.3 | 5.7 | 44.2 | 45 | 33 | 31 | 5 | 26 | 28 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 5.05 |
| RP | Betancourt, R.Betancourt, Rafael >> | 28 | 2003 | R | 85 | 20 | 0 | 2 | 2 | 3.54 | .257 | 1.04 | 6.1 | 3.2 | 6.1 | 28.0 | 19 | 11 | 11 | 4 | 10 | 19 | 0 | 0 | 2 | 0 | 0 | 0 | 1 | 4.57 |
| RP | Calero, K.Calero, Kiko >> | 28 | 2003 | R | 65 | 14 | 0 | 4 | 0 | 3.20 | .322 | 1.37 | 7.1 | 5.7 | 10.4 | 19.2 | 15 | 7 | 7 | 1 | 12 | 22 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3.42 |
| RP | Lopez, A.Lopez, Aquilino >> | 28 | 2003 | R | 59 | 17 | 0 | 0 | 0 | 7.00 | .372 | 1.72 | 11.5 | 4.0 | 7.5 | 18.0 | 23 | 14 | 14 | 4 | 8 | 15 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 5.72 |
| SP | Hentgen, P.Hentgen, Pat >> | 35 | 2003 | R | 48 | 9 | 0 | 3 | 1 | 5.23 | .392 | 1.84 | 11.7 | 5.4 | 8.1 | 10.1 | 13 | 6 | 6 | 0 | 6 | 9 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 3.30 |