Career Stats
| Season | TM | LG | W | L | ERA | G | GS | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | SO |
|---|
| 1962 | PIT | NL | 2 | 2 | 3.74 | 11 | 6 | 2 | 0 | 1 | 45.2 | 39 | 19 | 25 | 2 | 25 | 0 | 42 |
| 1963 | PIT | NL | 5 | 2 | 1.04 | 34 | 7 | 3 | 2 | 3 | 77.2 | 59 | 9 | 15 | 1 | 40 | 1 | 68 |
| 1964 | PIT | NL | 18 | 12 | 2.74 | 40 | 38 | 14 | 1 | 0 | 279.2 | 222 | 85 | 100 | 8 | 124 | 3 | 250 |
| 1965 | PIT | NL | 17 | 12 | 2.84 | 39 | 37 | 14 | 7 | 0 | 266.0 | 221 | 84 | 98 | 5 | 119 | 7 | 276 |
| 1966 | PIT | NL | 16 | 12 | 3.02 | 38 | 37 | 12 | 3 | 0 | 268.1 | 228 | 90 | 99 | 18 | 102 | 5 | 229 |
| 1967 | PIT | NL | 16 | 8 | 3.64 | 33 | 31 | 6 | 1 | 0 | 203.0 | 184 | 82 | 90 | 12 | 119 | 5 | 179 |
| 1968 | PIT | NL | 13 | 14 | 2.05 | 36 | 33 | 13 | 4 | 0 | 245.1 | 187 | 56 | 67 | 13 | 94 | 2 | 171 |
| 1969 | PIT | NL | 13 | 14 | 3.23 | 34 | 34 | 9 | 1 | 0 | 225.2 | 232 | 81 | 93 | 8 | 91 | 3 | 213 |
| 1970 | PIT | NL | 10 | 15 | 3.92 | 34 | 32 | 5 | 1 | 0 | 202.0 | 189 | 88 | 99 | 15 | 94 | 3 | 178 |
| 1971 | PIT | NL | 6 | 0 | 6.99 | 37 | 0 | 0 | 0 | 2 | 46.1 | 59 | 36 | 38 | 5 | 24 | 0 | 40 |
| 1972 | PIT | NL | 0 | 0 | 6.00 | 5 | 0 | 0 | 0 | 0 | 9.0 | 10 | 6 | 7 | 0 | 7 | 0 | 6 |
| 1972 | BOS | AL | 2 | 0 | 0.00 | 6 | 0 | 0 | 0 | 2 | 8.0 | 2 | 0 | 0 | 0 | 3 | 0 | 10 |
| 1972 | TOT | | 2 | 0 | 3.18 | 11 | 0 | 0 | 0 | 2 | 17.0 | 12 | 6 | 7 | 0 | 10 | 0 | 16 |
| 1973 | BOS | AL | 2 | 3 | 3.47 | 32 | 0 | 0 | 0 | 11 | 36.1 | 37 | 14 | 16 | 2 | 12 | 0 | 25 |
| 1974 | BOS | AL | 0 | 1 | 5.54 | 18 | 0 | 0 | 0 | 2 | 13.0 | 15 | 8 | 8 | 2 | 4 | 0 | 16 |
| Career | | | 120 | 95 | 3.07 | 397 | 255 | 78 | 20 | 21 | 1926.0 | 1,684 | 658 | 755 | 91 | 858 | 29 | 1,703 |
