Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1960 | LAD | 3 | 1 | 0 | 0 | 17.05 | 4 | 0 | 0 | 0 | 6.1 | 12 | 12 | 12 | 1 | 5 | 0 | 2.68 |
| 1961 | LAD | 4 | 2 | 0 | 2 | 5.54 | 15 | 1 | 0 | 0 | 13.0 | 10 | 8 | 9 | 6 | 2 | 0 | 0.92 |
| 1962 | LAD | 24 | 3 | 0 | 2 | 6.88 | 30 | 0 | 0 | 1 | 53.2 | 60 | 41 | 43 | 8 | 39 | 3 | 1.84 |
| 1963 | LAD | 1 | 0 | 0 | 0 | 18.00 | 1 | 0 | 0 | 0 | 1.0 | 2 | 2 | 2 | 1 | 0 | 0 | 2.00 |
| 1964 | LAD | 34 | 25 | 7 | 9 | 4.00 | 107 | 4 | 3 | 1 | 157.1 | 149 | 70 | 74 | 22 | 56 | 6 | 1.30 |
| 1965 | WSH | 35 | 29 | 12 | 15 | 5.11 | 88 | 4 | 2 | 0 | 179.2 | 176 | 102 | 107 | 33 | 97 | 5 | 1.52 |
| 1966 | WSH | 33 | 31 | 12 | 12 | 3.92 | 121 | 5 | 1 | 0 | 197.1 | 158 | 86 | 91 | 29 | 53 | 5 | 1.07 |
| 1967 | WSH | 34 | 34 | 10 | 10 | 3.03 | 122 | 5 | 2 | 0 | 219.2 | 189 | 74 | 77 | 16 | 57 | 6 | 1.12 |
| 1968 | WSH | 31 | 16 | 5 | 12 | 4.98 | 57 | 1 | 1 | 0 | 115.2 | 115 | 64 | 70 | 12 | 62 | 5 | 1.53 |
| 1969 | CAL | 5 | 0 | 0 | 0 | 10.13 | 4 | 0 | 0 | 0 | 8.0 | 13 | 9 | 13 | 3 | 7 | 0 | 2.50 |
| Career | 204 | 141 | 46 | 62 | 4.43 | 549 | 20 | 9 | 2 | 951.2 | 884 | 468 | 498 | 131 | 378 | 30 | 1.33 |
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