Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1955 | WSH | 40 | 14 | 5 | 9 | 5.96 | 79 | 3 | 2 | 0 | 119.1 | 136 | 79 | 87 | 9 | 67 | 7 | 1.70 |
| 1956 | WSH | 5 | 4 | 1 | 3 | 4.15 | 18 | 2 | 0 | 0 | 30.1 | 35 | 14 | 16 | 2 | 10 | 1 | 1.48 |
| 1957 | WSH | 26 | 16 | 2 | 10 | 6.78 | 50 | 2 | 0 | 0 | 85.0 | 100 | 64 | 65 | 9 | 65 | 4 | 1.94 |
| 1960 | WSH | 2 | 0 | 0 | 0 | 12.00 | 1 | 0 | 0 | 0 | 3.0 | 4 | 4 | 4 | 0 | 4 | 0 | 2.67 |
| 1963 | CLE | 43 | 0 | 7 | 2 | 2.88 | 47 | 0 | 0 | 12 | 59.1 | 54 | 19 | 25 | 3 | 29 | 0 | 1.40 |
| 1964 | CLE | 53 | 0 | 2 | 6 | 4.33 | 57 | 0 | 0 | 11 | 72.2 | 66 | 35 | 40 | 5 | 46 | 2 | 1.54 |
| 1965 | CHC | 84 | 0 | 4 | 6 | 2.57 | 104 | 0 | 0 | 31 | 136.1 | 113 | 39 | 49 | 7 | 56 | 5 | 1.24 |
| 1966 | CHC | 20 | 0 | 1 | 3 | 6.18 | 18 | 0 | 0 | 5 | 27.2 | 26 | 19 | 19 | 4 | 17 | 2 | 1.55 |
| 1966 | ATL | 38 | 0 | 4 | 4 | 3.86 | 42 | 0 | 0 | 4 | 65.1 | 58 | 28 | 34 | 5 | 36 | 0 | 1.44 |
| 1966 | TOT | 58 | 0 | 5 | 7 | 4.55 | 60 | 0 | 0 | 9 | 93.0 | 84 | 47 | 53 | 9 | 53 | 2 | 1.47 |
| 1967 | CIN | 70 | 0 | 6 | 3 | 1.27 | 88 | 0 | 0 | 28 | 106.1 | 63 | 15 | 19 | 1 | 41 | 5 | 0.98 |
| 1968 | CIN | 78 | 0 | 10 | 7 | 2.46 | 64 | 0 | 0 | 13 | 135.1 | 111 | 37 | 43 | 9 | 55 | 4 | 1.23 |
| 1969 | CHC | 56 | 0 | 4 | 3 | 3.16 | 55 | 0 | 0 | 3 | 85.1 | 75 | 30 | 38 | 8 | 42 | 1 | 1.37 |
| 1970 | TOT | 22 | 0 | 1 | 0 | 2.63 | 10 | 0 | 0 | 2 | 27.1 | 24 | 8 | 8 | 0 | 17 | 4 | 1.50 |
| 1970 | CHC | 11 | 0 | 0 | 0 | 2.00 | 2 | 0 | 0 | 1 | 9.0 | 9 | 2 | 2 | 0 | 5 | 1 | 1.56 |
| 1970 | STL | 11 | 0 | 1 | 0 | 2.95 | 8 | 0 | 0 | 1 | 18.1 | 15 | 6 | 6 | 0 | 12 | 3 | 1.47 |
| 1970 | KCR | 36 | 0 | 9 | 3 | 2.59 | 49 | 0 | 0 | 12 | 55.2 | 41 | 16 | 23 | 3 | 38 | 1 | 1.42 |
| 1970 | TOT | 58 | 0 | 10 | 3 | 2.60 | 59 | 0 | 0 | 14 | 83.0 | 65 | 24 | 31 | 3 | 55 | 5 | 1.45 |
| 1971 | KCR | 63 | 0 | 4 | 6 | 2.56 | 55 | 0 | 0 | 23 | 81.0 | 60 | 23 | 28 | 3 | 50 | 6 | 1.36 |
| 1972 | KCR | 45 | 0 | 3 | 4 | 1.70 | 28 | 0 | 0 | 5 | 58.1 | 44 | 11 | 15 | 2 | 19 | 3 | 1.08 |
| Career | 681 | 34 | 63 | 69 | 3.46 | 765 | 7 | 2 | 149 | 1148.1 | 1,010 | 441 | 513 | 70 | 592 | 45 | 1.40 |
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