Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1974 | DET | 5 | 3 | 2 | 0 | 2.73 | 10 | 1 | 0 | 0 | 33.0 | 35 | 10 | 13 | 1 | 6 | 1 | 1.24 |
1975 | DET | 32 | 31 | 11 | 12 | 4.03 | 67 | 8 | 3 | 0 | 190.0 | 199 | 85 | 104 | 17 | 65 | 7 | 1.39 |
1976 | DET | 32 | 32 | 9 | 12 | 3.92 | 88 | 5 | 1 | 0 | 199.2 | 227 | 87 | 99 | 19 | 59 | 4 | 1.43 |
1977 | DET | 14 | 10 | 3 | 5 | 5.70 | 27 | 0 | 0 | 0 | 66.1 | 83 | 42 | 44 | 9 | 15 | 3 | 1.48 |
1978 | HOU | 13 | 10 | 3 | 3 | 2.12 | 27 | 2 | 2 | 0 | 68.0 | 57 | 16 | 17 | 0 | 20 | 1 | 1.13 |
1979 | HOU | 13 | 10 | 2 | 6 | 4.07 | 33 | 2 | 2 | 0 | 66.1 | 64 | 30 | 33 | 9 | 8 | 2 | 1.09 |
1980 | HOU | 28 | 22 | 12 | 4 | 2.37 | 55 | 6 | 2 | 0 | 159.1 | 148 | 42 | 51 | 7 | 29 | 3 | 1.11 |
1981 | HOU | 20 | 15 | 4 | 6 | 2.91 | 39 | 1 | 0 | 1 | 102.0 | 97 | 33 | 36 | 6 | 20 | 1 | 1.15 |
1982 | HOU | 31 | 21 | 9 | 13 | 3.93 | 56 | 3 | 2 | 1 | 149.0 | 169 | 65 | 81 | 12 | 24 | 4 | 1.30 |
1983 | HOU | 41 | 9 | 8 | 5 | 3.69 | 43 | 0 | 0 | 3 | 114.2 | 107 | 47 | 49 | 13 | 36 | 3 | 1.25 |
1984 | HOU | 40 | 6 | 1 | 9 | 4.58 | 60 | 0 | 0 | 2 | 90.1 | 112 | 46 | 58 | 5 | 29 | 3 | 1.56 |
1985 | CLE | 42 | 16 | 2 | 10 | 4.32 | 54 | 1 | 0 | 3 | 125.0 | 139 | 60 | 65 | 16 | 30 | 2 | 1.35 |
1986 | CAL | 16 | 3 | 1 | 3 | 4.15 | 23 | 0 | 0 | 1 | 47.2 | 46 | 22 | 25 | 5 | 7 | 1 | 1.11 |
| Career | 327 | 188 | 67 | 88 | 3.73 | 582 | 29 | 12 | 11 | 1411.1 | 1,483 | 585 | 675 | 119 | 348 | 35 | 1.30 |
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