Career Stats
| Season | TM | LG | W | L | ERA | G | GS | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | SO |
|---|
| 1971 | SFG | NL | 5 | 9 | 4.15 | 24 | 19 | 2 | 2 | 0 | 110.2 | 110 | 51 | 56 | 9 | 55 | 3 | 63 |
| 1972 | SFG | NL | 6 | 8 | 2.98 | 27 | 16 | 4 | 1 | 0 | 123.2 | 97 | 41 | 48 | 11 | 49 | 2 | 85 |
| 1973 | CWS | AL | 6 | 11 | 4.24 | 36 | 22 | 3 | 0 | 1 | 176.1 | 163 | 83 | 87 | 11 | 82 | 7 | 138 |
| 1974 | CHC | NL | 8 | 6 | 4.14 | 38 | 23 | 1 | 0 | 0 | 169.2 | 185 | 78 | 92 | 19 | 64 | 4 | 90 |
| 1975 | CHC | NL | 12 | 8 | 3.95 | 33 | 32 | 6 | 1 | 0 | 214.1 | 198 | 94 | 103 | 24 | 80 | 5 | 139 |
| 1976 | CHC | NL | 3 | 6 | 4.08 | 17 | 15 | 1 | 1 | 0 | 75.0 | 70 | 34 | 36 | 6 | 21 | 3 | 33 |
| 1977 | CWS | AL | 15 | 12 | 4.51 | 31 | 31 | 8 | 0 | 0 | 207.1 | 228 | 104 | 115 | 25 | 80 | 5 | 124 |
| 1978 | CWS | AL | 12 | 12 | 4.37 | 30 | 30 | 6 | 1 | 0 | 212.0 | 196 | 103 | 110 | 19 | 84 | 3 | 118 |
| 1979 | BAL | AL | 11 | 7 | 3.77 | 32 | 32 | 3 | 0 | 0 | 186.0 | 173 | 78 | 91 | 31 | 73 | 1 | 96 |
| 1980 | BAL | AL | 25 | 7 | 3.23 | 37 | 37 | 9 | 1 | 0 | 250.2 | 224 | 90 | 103 | 22 | 101 | 6 | 149 |
| 1981 | BAL | AL | 4 | 7 | 4.60 | 15 | 12 | 0 | 0 | 0 | 62.2 | 63 | 32 | 39 | 7 | 27 | 1 | 30 |
| Career | | | 107 | 93 | 3.97 | 320 | 269 | 43 | 7 | 1 | 1788.1 | 1,707 | 788 | 880 | 184 | 716 | 40 | 1,065 |
