| Year | Team | W | L | G | IP | ERA | WHIP | K | BB | HR | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1982 | San Diego Padres | 2 | 5 | 15 | 63.2 | 4.10 | 1.46 | 25 | 27 | 4 | 3.53 | 3.82 |
| 1983 |
| San Diego Padres |
| 5 |
| 7 |
| 21 |
| 119.2 |
| 2.93 |
| 1.29 |
| 59 |
| 48 |
| 8 |
| 4.44 |
| 3.61 |
| 1984 | San Diego Padres | 8 | 9 | 36 | 146.0 | 4.68 | 1.47 | 77 | 72 | 13 | 4.75 | 4.44 |
| 1985 | San Diego Padres | 18 | 8 | 33 | 228.2 | 3.15 | 1.29 | 69 | 65 | 18 | 2.72 | 2.56 |
| 1986 | San Diego Padres | 10 | 8 | 37 | 209.1 | 4.30 | 1.40 | 117 | 75 | 24 | 5.03 | 3.22 |
| 1987 | San Diego Padres | 3 | 10 | 24 | 117.2 | 5.05 | 1.53 | 51 | 49 | 16 | 3.90 | 3.75 |
| 1988 | San Diego Padres | 14 | 11 | 33 | 217.2 | 3.35 | 1.25 | 91 | 76 | 16 | 3.76 | 3.14 |
| 1989 | New York Yankees | 15 | 15 | 34 | 208.1 | 4.80 | 1.51 | 98 | 76 | 23 | 4.23 | 3.28 |
| 1990 | New York Yankees | 5 | 12 | 28 | 157.2 | 5.37 | 1.51 | 74 | 82 | 20 | 4.22 | 4.68 |
| 1991 | New York Yankees | 0 | 2 | 4 | 12.2 | 9.95 | 2.29 | 5 | 6 | 5 | 3.55 | 4.26 |
| 1991 | Oakland Athletics | 4 | 4 | 15 | 77.0 | 4.79 | 1.35 | 40 | 36 | 5 | 4.68 | 4.21 |
| 1991 | 4 | 6 | 19 | 89.2 | 5.52 | 1.48 | 45 | 42 | 10 | 4.52 | 4.22 |
| Career | — | 84 | 91 | 280 | 1558.1 | 4.22 | 1.40 | 706 | 612 | 152 | 4.08 | 3.53 |
