| SP | Morgan, M.Morgan, Mike >> | 32 | 1991 | R | 95 | 28 | 28 | 5 | 17 | 4.86 | .356 | 1.65 | 11.4 | 3.5 | 4.6 | 166.2 | 211 | 98 | 90 | 13 | 64 | 84 | 2 | 0 | 0 | 0 | 13 | 1 | 5 | 4.18 |
| SP | Martinez, R.Martinez, Ramon >> | 23 | 1991 | R | 88 | 28 | 28 | 2 | 18 | 6.16 | .364 | 1.71 | 12.3 | 3.2 | 5.5 | 147.2 | 201 | 103 | 101 | 13 | 52 | 90 | 0 | 0 | 0 | 0 | 9 | 0 | 5 | 3.99 |
| SP | Belcher, T.Belcher, Tim >> | 30 | 1991 | R | 81 | 27 | 27 | 7 | 10 | 4.86 | .338 | 1.53 | 10.9 | 2.8 | 5.7 | 152.0 | 184 | 88 | 82 | 8 | 48 | 96 | 1 | 0 | 0 | 0 | 12 | 1 | 6 | 3.39 |
| SP | Hershiser, O.Hershiser, Orel >> | 33 | 1991 | R | 57 | 27 | 27 | 7 | 9 | 4.93 | .321 | 1.41 | 10.0 | 2.7 | 6.1 | 142.1 | 158 | 84 | 78 | 15 | 42 | 97 | 0 | 0 | 0 | 0 | 10 | 2 | 3 | 3.94 |
| CL | Howell, J.Howell, Jay # >> | 36 | 1991 | R | 94 | 67 | 0 | 3 | 2 | 4.26 | .337 | 1.51 | 10.4 | 3.2 | 7.1 | 76.0 | 88 | 39 | 36 | 4 | 27 | 60 | 0 | 5 | 3 | 0 | 0 | 1 | 0 | 3.21 |
| RP | Maddux, M.Maddux, Mike >> | 30 | 1991 | R | 85 | 60 | 0 | 9 | 4 | 4.42 | .318 | 1.36 | 8.4 | 3.9 | 5.3 | 71.1 | 66 | 38 | 35 | 10 | 31 | 42 | 0 | 2 | 1 | 0 | 0 | 3 | 1 | 5.08 |
| RP | Hartley, M.Hartley, Mike # >> | 30 | 1991 | R | 56 | 39 | 0 | 3 | 1 | 5.33 | .365 | 1.72 | 10.5 | 5.0 | 8.2 | 54.0 | 63 | 33 | 32 | 7 | 30 | 49 | 0 | 1 | 2 | 0 | 0 | 0 | 6 | 4.54 |