Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1962 | WSH | 42 | 3 | 2 | 4 | 3.31 | 39 | 0 | 0 | 4 | 68.0 | 56 | 25 | 27 | 6 | 49 | 0 | 1.54 |
1963 | WSH | 13 | 2 | 2 | 2 | 4.88 | 14 | 0 | 0 | 0 | 27.2 | 23 | 15 | 18 | 2 | 17 | 0 | 1.45 |
1964 | WSH | 49 | 7 | 4 | 7 | 4.16 | 67 | 0 | 0 | 3 | 106.0 | 108 | 49 | 60 | 13 | 45 | 0 | 1.44 |
1965 | WSH | 4 | 1 | 1 | 1 | 4.91 | 5 | 1 | 1 | 0 | 14.2 | 18 | 8 | 8 | 0 | 6 | 1 | 1.64 |
1966 | WSH | 30 | 18 | 3 | 9 | 4.26 | 68 | 2 | 0 | 0 | 114.0 | 125 | 54 | 58 | 9 | 59 | 3 | 1.61 |
1967 | WSH | 8 | 2 | 1 | 1 | 5.40 | 14 | 0 | 0 | 0 | 21.2 | 28 | 13 | 14 | 3 | 7 | 1 | 1.62 |
1968 | WSH | 25 | 22 | 10 | 6 | 3.01 | 75 | 4 | 1 | 0 | 140.1 | 147 | 47 | 53 | 4 | 50 | 4 | 1.40 |
1969 | WSH | 35 | 28 | 7 | 6 | 3.64 | 72 | 1 | 1 | 0 | 158.1 | 138 | 64 | 73 | 17 | 91 | 2 | 1.45 |
1970 | WSH | 42 | 17 | 9 | 11 | 4.01 | 61 | 1 | 1 | 0 | 128.0 | 119 | 57 | 65 | 17 | 54 | 1 | 1.35 |
1971 | DET | 7 | 0 | 1 | 0 | 3.27 | 6 | 0 | 0 | 0 | 11.0 | 7 | 4 | 4 | 1 | 7 | 1 | 1.27 |
1971 | MIL | 21 | 1 | 1 | 1 | 5.01 | 17 | 0 | 0 | 0 | 32.1 | 38 | 18 | 23 | 7 | 21 | 1 | 1.82 |
1971 | TOT | 28 | 1 | 2 | 1 | 4.57 | 23 | 0 | 0 | 0 | 43.1 | 45 | 22 | 27 | 8 | 28 | 2 | 1.68 |
| Career | 276 | 101 | 41 | 48 | 3.88 | 438 | 9 | 4 | 7 | 822.0 | 807 | 354 | 403 | 79 | 406 | 14 | 1.48 |
Astros 
Mariners 
Rangers 
Athletics 
Angels 
BOS 
CIN 
Phillies 
Braves 
Brewers 
Cubs 
Dodgers 
Padres 
Yankees 
Orioles 
Guardians 
Royals 
PIT 
MIA 
WSH 
