Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1968 | CAL | 28 | 5 | 4 | 2 | 2.21 | 74 | 2 | 1 | 3 | 81.1 | 44 | 20 | 21 | 3 | 35 | 1 | 0.97 |
1969 | CAL | 40 | 33 | 16 | 11 | 2.52 | 211 | 10 | 2 | 2 | 250.0 | 169 | 70 | 81 | 17 | 100 | 5 | 1.08 |
1970 | CAL | 37 | 26 | 11 | 10 | 3.01 | 162 | 6 | 1 | 5 | 194.2 | 144 | 65 | 75 | 21 | 78 | 6 | 1.14 |
1971 | CAL | 38 | 38 | 20 | 13 | 2.99 | 179 | 14 | 4 | 0 | 276.2 | 224 | 92 | 112 | 16 | 121 | 7 | 1.25 |
1972 | CAL | 25 | 21 | 8 | 11 | 2.81 | 142 | 10 | 3 | 2 | 169.2 | 125 | 53 | 56 | 5 | 68 | 2 | 1.14 |
1973 | LAD | 33 | 33 | 14 | 10 | 2.70 | 177 | 10 | 3 | 0 | 249.2 | 196 | 75 | 90 | 24 | 77 | 6 | 1.09 |
1974 | LAD | 39 | 39 | 20 | 6 | 2.59 | 221 | 13 | 3 | 0 | 292.1 | 227 | 84 | 93 | 24 | 94 | 3 | 1.10 |
1975 | LAD | 42 | 40 | 19 | 14 | 2.29 | 213 | 19 | 7 | 1 | 321.2 | 244 | 82 | 92 | 22 | 96 | 5 | 1.06 |
1976 | ATL | 29 | 28 | 11 | 11 | 3.04 | 135 | 12 | 3 | 1 | 207.1 | 166 | 70 | 83 | 14 | 74 | 2 | 1.16 |
1977 | ATL | 16 | 16 | 5 | 4 | 4.40 | 69 | 1 | 0 | 0 | 102.1 | 101 | 50 | 54 | 12 | 39 | 2 | 1.37 |
1978 | NYY | 6 | 5 | 0 | 3 | 5.64 | 16 | 0 | 0 | 0 | 22.1 | 24 | 14 | 21 | 7 | 15 | 1 | 1.75 |
1979 | LAD | 11 | 11 | 2 | 4 | 4.91 | 26 | 1 | 0 | 0 | 62.1 | 55 | 34 | 34 | 9 | 34 | 0 | 1.43 |
| Career | 344 | 295 | 130 | 99 | 2.86 | 1,625 | 98 | 27 | 14 | 2230.1 | 1,719 | 709 | 812 | 174 | 831 | 40 | 1.14 |
Astros 
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NYM 
