| Year | Tm | G | W | L | Sv | IP | K | ERA | WHIP | R$ | T15 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1982 | MIN | 22 | 4 | 10 | 0 | 126 | 84 | 5.21 | 1.51 | -$1 | |
| 1983 | MIN | 35 | 7 | 15 | 0 | 210 | 127 | 5.49 | 1.59 | -$7 | |
| 1984 | MIN | 35 | 18 | 12 | 0 | 257 | 149 | 3.21 | 1.16 | $21 | T15 |
| 1985 | MIN | 36 | 18 | 14 | 0 | 250 | 135 | 4.09 | 1.32 | $12 | |
| 1986 | MIN | 37 | 16 | 13 | 0 | 245 | 191 | 4.51 | 1.38 | $9 | |
| 1987 | MIN | 36 | 17 | 10 | 0 | 251 | 197 | 2.90 | 1.18 | $25 | T15 |
| 1988 | MIN | 35 | 24 | 7 | 0 | 255 | 193 | 2.64 | 1.14 | $26 | T15 |
| 1989 | MIN-NYM | 36 | 13 | 17 | 0 | 261 | 211 | 3.66 | 1.23 | $16 | |
| 1990 | NYM | 35 | 20 | 12 | 0 | 249 | 182 | 2.67 | 1.15 | $28 | T15 |
| 1990 | NYM | 35 | 20 | 12 | 0 | 249 | 182 | 2.67 | 1.15 | $28 | T15 |
| 1991 | NYM | 35 | 13 | 15 | 0 | 231 | 132 | 3.97 | 1.35 | $8 | |
| 1992 | BOS | 35 | 13 | 12 | 0 | 238 | 121 | 3.44 | 1.27 | $12 | |
| 1993 | BOS | 29 | 11 | 8 | 0 | 183 | 91 | 3.14 | 1.37 | $11 | |
| 1994 | BOS | 6 | 1 | 1 | 0 | 31 | 9 | 4.65 | 1.65 | -$3 | |
| 1995 | CIN | 3 | 0 | 1 | 0 | 14 | 4 | 6.28 | 1.61 | -$4 | |
| 1996 | TOR | 6 | 1 | 3 | 0 | 30 | 18 | 7.71 | 2.11 | -$7 |