| SP | Colon, B.Colon, Bartolo # >> | 30 | 2003 | R | 79 | 14 | 14 | 9 | 2 | 3.05 | .288 | 1.17 | 7.5 | 3.1 | 5.7 | 100.1 | 83 | 36 | 34 | 5 | 34 | 63 | 1 | 0 | 0 | 0 | 9 | 5 | 1 | 3.56 |
| SP | Franklin, R.Franklin, Ryan >> | 30 | 2003 | R | 67 | 14 | 14 | 3 | 7 | 5.83 | .364 | 1.69 | 11.5 | 3.7 | 4.4 | 71.0 | 91 | 50 | 46 | 15 | 29 | 35 | 0 | 0 | 0 | 0 | 4 | 2 | 1 | 6.07 |
| SP | Willis, D.Willis, Dontrelle >> | 21 | 2003 | L | 62 | 13 | 13 | 2 | 5 | 8.39 | .386 | 1.84 | 13.2 | 3.5 | 8.4 | 49.1 | 72 | 47 | 46 | 13 | 19 | 46 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 5.86 |
| SP | Sabathia, C.Sabathia, CC >> | 23 | 2003 | L | 45 | 14 | 13 | 5 | 2 | 4.44 | .328 | 1.44 | 10.6 | 2.3 | 6.6 | 71.0 | 84 | 35 | 35 | 11 | 18 | 52 | 0 | 0 | 0 | 0 | 6 | 2 | 1 | 4.39 |
| RP | Betancourt, R.Betancourt, Rafael >> | 28 | 2003 | R | 85 | 35 | 0 | 3 | 1 | 3.22 | .298 | 1.23 | 7.0 | 4.3 | 7.0 | 44.2 | 34 | 17 | 16 | 5 | 21 | 34 | 0 | 1 | 1 | 0 | 0 | 2 | 1 | 4.50 |
| RP | Percival, T.Percival, Troy >> | 34 | 2003 | R | 80 | 28 | 0 | 2 | 2 | 4.26 | .317 | 1.39 | 9.2 | 3.3 | 5.9 | 38.0 | 39 | 18 | 18 | 6 | 14 | 25 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 4.84 |
| RP | Isringhausen, J.Isringhausen, Jason >> | 31 | 2003 | R | 77 | 29 | 0 | 2 | 1 | 4.71 | .343 | 1.51 | 9.3 | 4.5 | 8.5 | 36.1 | 37 | 19 | 19 | 4 | 18 | 34 | 0 | 1 | 0 | 0 | 0 | 2 | 1 | 4.22 |
| RP | Stanton, M.Stanton, Mike >> | 36 | 2003 | L | 56 | 25 | 0 | 2 | 0 | 1.21 | .264 | 1.08 | 5.9 | 4.0 | 5.9 | 29.2 | 19 | 4 | 4 | 1 | 13 | 19 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 3.48 |
| SU | Spooneybarger, T.Spooneybarger, Tim >> | 24 | 2003 | R | 91 | 29 | 0 | 1 | 3 | 5.13 | .320 | 1.41 | 7.9 | 4.9 | 4.9 | 33.1 | 29 | 19 | 19 | 2 | 18 | 18 | 0 | 2 | 2 | 0 | 0 | 0 | 3 | 4.33 |
| CL | Wagner, B.Wagner, Billy >> | 32 | 2003 | L | 99 | 28 | 0 | 1 | 2 | 3.45 | .312 | 1.36 | 7.4 | 5.1 | 10.9 | 28.2 | 23 | 11 | 11 | 3 | 16 | 34 | 0 | 14 | 2 | 0 | 0 | 0 | 1 | 3.68 |