| SP | Garrelts, S.Garrelts, Scott >> | 28 | 1989 | R | 97 | 20 | 20 | 8 | 6 | 2.53 | .292 | 1.24 | 8.6 | 2.5 | 4.7 | 135.0 | 129 | 39 | 38 | 4 | 38 | 71 | 0 | 0 | 0 | 0 | 14 | 0 | 5 | 3.18 |
| SP | Deshaies, J.Deshaies, Jim † # >> | 29 | 1989 | L | 86 | 19 | 19 | 13 | 5 | 3.11 | .273 | 1.12 | 7.0 | 3.1 | 4.5 | 130.1 | 101 | 47 | 45 | 10 | 45 | 65 | 2 | 0 | 0 | 1 | 14 | 1 | 2 | 4.06 |
| SP | Clemens, R.Clemens, Roger >> | 27 | 1989 | R | 73 | 19 | 19 | 5 | 10 | 4.14 | .336 | 1.51 | 10.0 | 3.7 | 5.4 | 121.2 | 134 | 58 | 56 | 3 | 50 | 72 | 1 | 0 | 0 | 0 | 9 | 1 | 5 | 3.40 |
| SP | Glavine, T.Glavine, Tom >> | 23 | 1989 | L | 67 | 18 | 18 | 9 | 4 | 3.96 | .312 | 1.36 | 9.2 | 3.1 | 3.8 | 109.0 | 111 | 55 | 48 | 4 | 37 | 46 | 0 | 0 | 0 | 0 | 11 | 0 | 1 | 3.65 |
| CL | Andersen, L.Andersen, Larry † >> | 36 | 1989 | R | 95 | 40 | 0 | 3 | 3 | 1.89 | .281 | 1.15 | 7.7 | 2.9 | 5.2 | 47.2 | 40 | 10 | 10 | 1 | 15 | 27 | 0 | 27 | 1 | 0 | 0 | 1 | 0 | 3.15 |
| RP | McClure, B.McClure, Bob >> | 37 | 1989 | L | 86 | 54 | 0 | 1 | 0 | 1.83 | .261 | 1.06 | 6.3 | 3.3 | 4.9 | 44.1 | 31 | 9 | 9 | 3 | 16 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.89 |
| RP | Charlton, N.Charlton, Norm >> | 26 | 1989 | L | 83 | 36 | 0 | 2 | 0 | 4.50 | .345 | 1.58 | 7.9 | 6.4 | 7.9 | 24.0 | 21 | 12 | 12 | 1 | 17 | 21 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 3.92 |
| RP | Costello, J.Costello, John >> | 29 | 1989 | R | 73 | 31 | 0 | 1 | 0 | 2.03 | .216 | 0.83 | 6.2 | 1.4 | 4.5 | 26.2 | 18 | 6 | 6 | 0 | 4 | 13 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2.46 |
| RP | Aguilera, R.Aguilera, Rick >> | 28 | 1989 | R | 64 | 22 | 0 | 1 | 1 | 7.04 | .361 | 1.70 | 12.1 | 3.1 | 8.6 | 23.0 | 31 | 18 | 18 | 1 | 8 | 22 | 0 | 1 | 1 | 0 | 0 | 0 | 2 | 2.70 |