| SP | Glavine, T.Glavine, Tom >> | 25 | 1991 | L | 97 | 12 | 12 | 3 | 6 | 3.36 | .307 | 1.32 | 8.2 | 3.7 | 6.5 | 91.0 | 83 | 39 | 34 | 7 | 37 | 66 | 3 | 0 | 0 | 1 | 8 | 1 | 0 | 3.80 |
| SP | Hesketh, J.Hesketh, Joe >> | 32 | 1991 | L | 38 | 12 | 12 | 0 | 3 | 2.70 | .333 | 1.50 | 8.8 | 4.7 | 6.8 | 40.0 | 39 | 12 | 12 | 2 | 21 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.73 |
| SP | Appier, K.Appier, Kevin >> | 24 | 1991 | R | 30 | 11 | 11 | 6 | 4 | 3.95 | .323 | 1.39 | 8.7 | 3.9 | 4.9 | 70.2 | 68 | 35 | 31 | 5 | 30 | 38 | 0 | 0 | 0 | 0 | 7 | 3 | 2 | 4.26 |
| SP | Hershiser, O.Hershiser, Orel >> | 33 | 1991 | R | 25 | 12 | 11 | 6 | 1 | 3.09 | .304 | 1.31 | 9.0 | 2.8 | 5.8 | 64.0 | 64 | 25 | 22 | 5 | 20 | 41 | 0 | 0 | 0 | 0 | 4 | 0 | 1 | 3.67 |
| CL | Aguilera, R.Aguilera, Rick >> | 30 | 1991 | R | 93 | 31 | 0 | 2 | 2 | 4.55 | .345 | 1.55 | 10.2 | 4.1 | 6.1 | 31.2 | 35 | 16 | 16 | 4 | 14 | 21 | 0 | 13 | 1 | 0 | 0 | 1 | 0 | 4.77 |
| RP | Willis, C.Willis, Carl >> | 31 | 1991 | R | 75 | 33 | 0 | 2 | 1 | 4.68 | .300 | 1.25 | 8.7 | 2.7 | 5.7 | 57.2 | 55 | 32 | 30 | 4 | 17 | 36 | 0 | 3 | 1 | 0 | 0 | 2 | 1 | 3.65 |
| RP | Gossage, R.Gossage, Rich >> | 40 | 1991 | R | 66 | 24 | 0 | 5 | 0 | 1.31 | .243 | 0.93 | 5.0 | 3.4 | 6.6 | 34.1 | 19 | 6 | 5 | 0 | 13 | 25 | 0 | 1 | 1 | 0 | 0 | 1 | 2 | 2.76 |
| RP | Machado, J.Machado, Julio >> | 26 | 1991 | R | 60 | 20 | 0 | 2 | 1 | 2.63 | .265 | 1.04 | 4.9 | 4.5 | 9.8 | 24.0 | 13 | 9 | 7 | 1 | 12 | 26 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 3.00 |