Career Stats
| Season | TM | LG | W | L | ERA | G | GS | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | SO |
|---|
| 1966 | PIT | NL | 0 | 0 | 9.00 | 2 | 0 | 0 | 0 | 0 | 3.0 | 3 | 3 | 3 | 2 | 3 | 0 | 0 |
| 1967 | PIT | NL | 1 | 1 | 2.70 | 6 | 2 | 1 | 0 | 0 | 23.1 | 23 | 7 | 12 | 1 | 12 | 1 | 11 |
| 1969 | PIT | NL | 0 | 0 | 3.24 | 8 | 0 | 0 | 0 | 0 | 16.2 | 14 | 6 | 8 | 1 | 4 | 0 | 7 |
| 1969 | WSH | AL | 4 | 7 | 4.04 | 30 | 11 | 2 | 0 | 1 | 84.2 | 87 | 38 | 43 | 8 | 48 | 1 | 50 |
| 1969 | TOT | | 4 | 7 | 3.91 | 38 | 11 | 2 | 0 | 1 | 101.1 | 101 | 44 | 51 | 9 | 52 | 1 | 57 |
| 1970 | WSH | AL | 6 | 7 | 3.68 | 39 | 14 | 2 | 1 | 0 | 117.1 | 107 | 48 | 57 | 6 | 51 | 0 | 57 |
| 1971 | WSH | AL | 3 | 11 | 3.53 | 40 | 15 | 3 | 1 | 0 | 120.0 | 123 | 47 | 56 | 10 | 49 | 3 | 47 |
| 1972 | TEX | AL | 2 | 4 | 3.47 | 22 | 6 | 0 | 0 | 1 | 57.0 | 46 | 22 | 24 | 6 | 16 | 2 | 30 |
| 1973 | TEX | AL | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 0 | 1.2 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| 1974 | TEX | AL | 0 | 0 | 5.84 | 11 | 0 | 0 | 0 | 0 | 24.2 | 30 | 16 | 18 | 5 | 12 | 1 | 14 |
| 1977 | MIN | AL | 0 | 0 | 7.94 | 5 | 0 | 0 | 0 | 0 | 5.2 | 10 | 5 | 7 | 1 | 5 | 0 | 3 |
| Career | | | 16 | 30 | 3.81 | 165 | 48 | 8 | 2 | 2 | 454.0 | 443 | 192 | 228 | 40 | 200 | 8 | 222 |
