Career Stats
| Season | TM | LG | W | L | ERA | G | GS | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | SO |
|---|
| 1968 | CAL | AL | 4 | 4 | 2.79 | 52 | 4 | 0 | 0 | 3 | 84.0 | 67 | 26 | 27 | 7 | 37 | 2 | 66 |
| 1969 | SEA | AL | 7 | 12 | 5.62 | 34 | 27 | 2 | 1 | 0 | 158.2 | 166 | 99 | 104 | 29 | 71 | 2 | 126 |
| 1970 | MIL | AL | 14 | 12 | 3.39 | 37 | 29 | 11 | 0 | 0 | 233.1 | 204 | 88 | 91 | 20 | 71 | 6 | 161 |
| 1971 | MIL | AL | 14 | 14 | 3.13 | 36 | 36 | 9 | 5 | 0 | 264.2 | 225 | 92 | 100 | 29 | 73 | 4 | 169 |
| 1972 | BOS | AL | 17 | 13 | 3.24 | 38 | 35 | 13 | 4 | 0 | 253.0 | 232 | 91 | 102 | 19 | 65 | 9 | 168 |
| 1973 | BOS | AL | 15 | 15 | 4.31 | 34 | 30 | 11 | 2 | 1 | 219.1 | 238 | 105 | 112 | 31 | 69 | 8 | 119 |
| 1974 | KCR | AL | 3 | 7 | 3.99 | 25 | 11 | 2 | 0 | 0 | 117.1 | 121 | 52 | 55 | 10 | 28 | 2 | 50 |
| 1975 | KCR | AL | 10 | 10 | 3.25 | 44 | 15 | 5 | 1 | 5 | 177.0 | 173 | 64 | 77 | 13 | 45 | 3 | 89 |
| 1976 | KCR | AL | 8 | 14 | 2.49 | 44 | 15 | 4 | 1 | 5 | 141.0 | 114 | 39 | 51 | 9 | 38 | 3 | 65 |
| 1977 | KCR | AL | 10 | 3 | 3.58 | 31 | 10 | 4 | 0 | 0 | 128.1 | 115 | 51 | 56 | 16 | 37 | 2 | 55 |
| 1978 | KCR | AL | 3 | 3 | 3.32 | 32 | 5 | 2 | 0 | 4 | 78.2 | 72 | 29 | 41 | 8 | 25 | 2 | 30 |
| 1979 | KCR | AL | 5 | 2 | 4.58 | 31 | 7 | 1 | 0 | 3 | 94.1 | 109 | 48 | 50 | 11 | 21 | 1 | 41 |
| 1980 | KCR | AL | 4 | 0 | 3.64 | 37 | 0 | 0 | 0 | 4 | 89.0 | 97 | 36 | 39 | 7 | 23 | 1 | 40 |
| Career | | | 114 | 109 | 3.62 | 475 | 224 | 64 | 14 | 25 | 2038.2 | 1,933 | 820 | 905 | 209 | 603 | 45 | 1,179 |
