Career Stats
| Season | TM | LG | W | L | ERA | G | GS | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | SO |
|---|
| 1964 | KCA | AL | 1 | 2 | 10.06 | 5 | 5 | 1 | 1 | 0 | 17.0 | 29 | 19 | 21 | 5 | 11 | 0 | 10 |
| 1965 | KCA | AL | 0 | 0 | 9.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 2 | 1 | 1 | 0 | 2 | 0 | 0 |
| 1966 | KCA | AL | 5 | 5 | 2.49 | 14 | 14 | 4 | 2 | 0 | 90.1 | 70 | 25 | 31 | 1 | 53 | 2 | 47 |
| 1967 | KCA | AL | 3 | 8 | 5.04 | 29 | 17 | 0 | 0 | 0 | 103.2 | 94 | 58 | 67 | 9 | 68 | 3 | 67 |
| 1968 | OAK | AL | 16 | 10 | 2.45 | 32 | 31 | 9 | 4 | 0 | 231.1 | 179 | 63 | 74 | 9 | 98 | 7 | 143 |
| 1969 | OAK | AL | 15 | 6 | 2.92 | 32 | 32 | 10 | 3 | 0 | 231.1 | 179 | 75 | 87 | 15 | 112 | 6 | 150 |
| 1970 | OAK | AL | 9 | 8 | 3.80 | 29 | 29 | 4 | 1 | 0 | 156.1 | 128 | 66 | 77 | 14 | 100 | 8 | 88 |
| 1971 | OAK | AL | 10 | 12 | 4.29 | 25 | 25 | 3 | 1 | 0 | 140.2 | 147 | 67 | 78 | 13 | 71 | 0 | 69 |
| 1972 | OAK | AL | 15 | 6 | 2.50 | 31 | 30 | 4 | 2 | 0 | 194.1 | 164 | 54 | 62 | 10 | 87 | 3 | 86 |
| 1973 | OAK | AL | 5 | 12 | 4.49 | 30 | 24 | 3 | 0 | 0 | 150.1 | 153 | 75 | 86 | 14 | 67 | 2 | 83 |
| 1974 | OAK | AL | 1 | 5 | 3.81 | 34 | 5 | 1 | 0 | 1 | 87.1 | 85 | 37 | 39 | 4 | 52 | 3 | 52 |
| 1975 | TOT | AL | 1 | 2 | 7.59 | 10 | 3 | 1 | 1 | 0 | 21.1 | 23 | 18 | 18 | 2 | 19 | 1 | 14 |
| 1975 | ATL | NL | 1 | 7 | 7.07 | 15 | 10 | 0 | 0 | 0 | 56.0 | 78 | 44 | 46 | 5 | 28 | 0 | 30 |
| 1975 | CLE | AL | 1 | 0 | 2.61 | 3 | 1 | 1 | 1 | 0 | 10.1 | 4 | 3 | 3 | 1 | 8 | 0 | 10 |
| 1975 | OAK | AL | 0 | 2 | 12.27 | 7 | 2 | 0 | 0 | 0 | 11.0 | 19 | 15 | 15 | 1 | 11 | 1 | 4 |
| 1975 | TOT | | 2 | 9 | 7.22 | 25 | 13 | 1 | 1 | 0 | 77.1 | 101 | 62 | 64 | 7 | 47 | 1 | 44 |
| 1976 | CWS | AL | 2 | 2 | 5.79 | 8 | 4 | 0 | 0 | 0 | 28.0 | 31 | 18 | 21 | 2 | 20 | 1 | 18 |
| Career | | | 84 | 85 | 3.70 | 295 | 229 | 40 | 15 | 1 | 1509.0 | 1,362 | 620 | 708 | 103 | 788 | 36 | 857 |
