Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1965 | BOS | 32 | 31 | 9 | 17 | 4.47 | 113 | 7 | 1 | 0 | 185.1 | 193 | 92 | 112 | 20 | 65 | 3 | 1.39 |
1966 | BOS | 45 | 23 | 10 | 10 | 3.86 | 131 | 3 | 1 | 2 | 181.2 | 173 | 78 | 86 | 18 | 55 | 7 | 1.26 |
1967 | BOS | 39 | 39 | 22 | 9 | 3.16 | 246 | 15 | 2 | 0 | 273.1 | 228 | 96 | 102 | 23 | 83 | 19 | 1.14 |
1968 | BOS | 23 | 17 | 6 | 10 | 4.29 | 73 | 4 | 1 | 0 | 113.1 | 89 | 54 | 57 | 11 | 59 | 11 | 1.31 |
1969 | BOS | 29 | 23 | 7 | 11 | 4.51 | 100 | 4 | 0 | 0 | 143.2 | 148 | 72 | 78 | 15 | 65 | 7 | 1.48 |
1970 | BOS | 9 | 4 | 4 | 1 | 3.18 | 21 | 0 | 0 | 0 | 34.0 | 33 | 12 | 12 | 3 | 9 | 0 | 1.24 |
1971 | BOS | 27 | 26 | 10 | 7 | 4.13 | 100 | 5 | 1 | 0 | 167.2 | 167 | 77 | 86 | 15 | 67 | 14 | 1.40 |
1972 | MIL | 33 | 30 | 14 | 12 | 2.83 | 143 | 11 | 2 | 1 | 223.0 | 197 | 70 | 75 | 17 | 76 | 11 | 1.22 |
1973 | PHI | 38 | 30 | 13 | 16 | 4.88 | 106 | 6 | 0 | 0 | 199.1 | 218 | 108 | 124 | 25 | 80 | 9 | 1.49 |
1974 | PHI | 39 | 39 | 17 | 13 | 3.21 | 121 | 16 | 3 | 0 | 283.0 | 280 | 101 | 113 | 22 | 70 | 6 | 1.24 |
1975 | PHI | 27 | 26 | 8 | 6 | 4.12 | 72 | 6 | 2 | 0 | 159.1 | 161 | 73 | 84 | 12 | 45 | 5 | 1.29 |
1976 | PHI | 33 | 32 | 18 | 10 | 3.08 | 118 | 8 | 1 | 1 | 222.0 | 210 | 76 | 85 | 18 | 50 | 5 | 1.17 |
1977 | PHI | 25 | 25 | 11 | 4 | 4.11 | 76 | 4 | 1 | 0 | 157.2 | 157 | 72 | 77 | 15 | 50 | 5 | 1.31 |
1978 | PHI | 22 | 22 | 8 | 10 | 5.23 | 48 | 1 | 0 | 0 | 113.2 | 132 | 66 | 69 | 16 | 45 | 2 | 1.56 |
1979 | PHI | 4 | 1 | 0 | 1 | 11.05 | 7 | 0 | 0 | 0 | 7.1 | 14 | 9 | 10 | 3 | 4 | 1 | 2.45 |
| Career | 425 | 368 | 157 | 137 | 3.86 | 1,475 | 90 | 15 | 4 | 2464.1 | 2,400 | 1,056 | 1,170 | 233 | 823 | 105 | 1.31 |
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