Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1965 | PHI | 7 | 0 | 2 | 1 | 2.19 | 10 | 0 | 0 | 1 | 12.1 | 7 | 3 | 3 | 2 | 2 | 0 | 0.73 |
1966 | PHI | 1 | 0 | 0 | 0 | 3.86 | 2 | 0 | 0 | 0 | 2.1 | 3 | 1 | 2 | 0 | 1 | 0 | 1.71 |
1966 | CHC | 60 | 12 | 6 | 8 | 3.31 | 148 | 2 | 1 | 5 | 182.0 | 147 | 67 | 75 | 24 | 51 | 3 | 1.09 |
1966 | TOT | 61 | 12 | 6 | 8 | 3.32 | 150 | 2 | 1 | 5 | 184.1 | 150 | 68 | 77 | 24 | 52 | 3 | 1.10 |
1967 | CHC | 38 | 38 | 20 | 13 | 2.80 | 236 | 20 | 3 | 0 | 289.1 | 230 | 90 | 101 | 30 | 83 | 4 | 1.08 |
1968 | CHC | 40 | 40 | 20 | 15 | 2.63 | 260 | 20 | 3 | 0 | 308.0 | 255 | 90 | 96 | 26 | 65 | 3 | 1.04 |
1969 | CHC | 43 | 42 | 21 | 15 | 3.21 | 273 | 23 | 7 | 1 | 311.1 | 284 | 111 | 122 | 27 | 71 | 8 | 1.14 |
1970 | CHC | 40 | 39 | 22 | 16 | 3.39 | 274 | 24 | 3 | 0 | 313.0 | 265 | 118 | 128 | 30 | 60 | 7 | 1.04 |
1971 | CHC | 39 | 39 | 24 | 13 | 2.77 | 263 | 30 | 3 | 0 | 325.0 | 304 | 100 | 114 | 29 | 37 | 5 | 1.05 |
1972 | CHC | 36 | 36 | 20 | 12 | 3.20 | 184 | 23 | 5 | 0 | 289.1 | 253 | 103 | 111 | 32 | 62 | 7 | 1.09 |
1973 | CHC | 38 | 38 | 14 | 16 | 3.89 | 170 | 7 | 2 | 0 | 271.0 | 267 | 117 | 133 | 35 | 57 | 4 | 1.20 |
1974 | TEX | 41 | 41 | 25 | 12 | 2.82 | 225 | 29 | 6 | 0 | 328.1 | 286 | 103 | 117 | 27 | 45 | 8 | 1.01 |
1975 | TEX | 37 | 37 | 17 | 18 | 3.93 | 157 | 22 | 4 | 0 | 270.0 | 261 | 118 | 130 | 37 | 56 | 9 | 1.17 |
1976 | BOS | 30 | 29 | 12 | 11 | 3.27 | 142 | 12 | 2 | 0 | 209.0 | 201 | 76 | 85 | 20 | 43 | 5 | 1.17 |
1977 | BOS | 28 | 28 | 10 | 10 | 3.68 | 105 | 11 | 1 | 0 | 193.0 | 190 | 79 | 91 | 30 | 36 | 0 | 1.17 |
1978 | TEX | 34 | 30 | 18 | 8 | 3.04 | 157 | 16 | 4 | 0 | 249.0 | 228 | 84 | 92 | 21 | 41 | 3 | 1.08 |
1979 | TEX | 37 | 37 | 16 | 14 | 4.07 | 164 | 10 | 3 | 0 | 259.0 | 252 | 117 | 127 | 40 | 81 | 3 | 1.29 |
1980 | TEX | 29 | 29 | 12 | 12 | 3.77 | 129 | 12 | 0 | 0 | 198.0 | 190 | 83 | 90 | 22 | 52 | 4 | 1.22 |
1981 | TEX | 19 | 16 | 5 | 8 | 4.50 | 63 | 1 | 0 | 0 | 106.0 | 122 | 53 | 55 | 14 | 40 | 0 | 1.53 |
1982 | CHC | 34 | 34 | 14 | 15 | 3.15 | 134 | 4 | 1 | 0 | 217.1 | 221 | 76 | 92 | 19 | 68 | 5 | 1.33 |
1983 | CHC | 33 | 29 | 6 | 9 | 4.30 | 96 | 1 | 1 | 0 | 167.1 | 176 | 80 | 89 | 19 | 46 | 6 | 1.33 |
| Career | 664 | 594 | 284 | 226 | 3.34 | 3,192 | 267 | 49 | 7 | 4500.2 | 4,142 | 1,669 | 1,853 | 484 | 997 | 84 | 1.14 |
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