| SP | Belcher, T.Belcher, Tim >> | 28 | 1989 | R | 92 | 36 | 36 | 12 | 12 | 3.98 | .296 | 1.25 | 7.7 | 3.5 | 4.6 | 226.0 | 194 | 103 | 100 | 17 | 89 | 115 | 1 | 0 | 0 | 0 | 21 | 2 | 8 | 4.17 |
| SP | Whitson, E.Whitson, Ed >> | 34 | 1989 | R | 85 | 35 | 35 | 14 | 15 | 4.24 | .318 | 1.40 | 9.7 | 2.9 | 4.7 | 240.0 | 259 | 127 | 113 | 28 | 76 | 125 | 4 | 0 | 0 | 0 | 22 | 1 | 5 | 4.44 |
| SP | Drabek, D.Drabek, Doug >> | 27 | 1989 | R | 74 | 33 | 33 | 13 | 16 | 5.07 | .354 | 1.62 | 11.1 | 3.5 | 4.6 | 211.1 | 261 | 128 | 119 | 18 | 82 | 107 | 1 | 0 | 0 | 1 | 14 | 5 | 2 | 4.33 |
| SP | Finley, C.Finley, Chuck >> | 27 | 1989 | L | 61 | 29 | 29 | 11 | 11 | 4.74 | .340 | 1.53 | 9.5 | 4.4 | 5.1 | 191.2 | 201 | 109 | 101 | 14 | 93 | 108 | 3 | 0 | 0 | 0 | 17 | 2 | 4 | 4.31 |
| RP | Montgomery, J.Montgomery, Jeff † >> | 27 | 1989 | R | 97 | 96 | 0 | 10 | 3 | 2.40 | .267 | 1.09 | 7.2 | 2.7 | 8.3 | 146.1 | 116 | 44 | 39 | 6 | 44 | 135 | 0 | 16 | 3 | 0 | 0 | 0 | 5 | 2.59 |
| RP | Bedrosian, S.Bedrosian, Steve >> | 32 | 1989 | R | 78 | 76 | 0 | 8 | 5 | 2.22 | .286 | 1.20 | 6.3 | 4.5 | 5.7 | 97.1 | 68 | 27 | 24 | 5 | 49 | 61 | 0 | 16 | 5 | 0 | 0 | 0 | 1 | 3.93 |
| RP | Costello, J.Costello, John # >> | 29 | 1989 | R | 73 | 37 | 0 | 3 | 1 | 4.10 | .342 | 1.56 | 11.0 | 3.3 | 4.4 | 41.2 | 50 | 20 | 19 | 1 | 15 | 20 | 0 | 3 | 2 | 0 | 0 | 0 | 0 | 3.44 |
| RP | Harris, G.Harris, Greg >> | 26 | 1989 | R | 69 | 21 | 0 | 2 | 2 | 4.67 | .319 | 1.41 | 9.0 | 3.7 | 5.7 | 27.0 | 27 | 14 | 14 | 4 | 11 | 17 | 0 | 3 | 0 | 0 | 0 | 0 | 1 | 4.89 |
| RP | Lefferts, C.Lefferts, Craig >> | 32 | 1989 | L | 68 | 14 | 0 | 0 | 0 | 1.93 | .222 | 0.86 | 6.4 | 1.3 | 5.1 | 14.0 | 10 | 3 | 3 | 1 | 2 | 8 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3.21 |