Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1971 | WSH | 18 | 18 | 5 | 9 | 3.47 | 89 | 7 | 1 | 0 | 124.2 | 104 | 48 | 57 | 10 | 53 | 10 | 1.26 |
1972 | TEX | 39 | 25 | 5 | 12 | 4.29 | 133 | 3 | 2 | 1 | 176.1 | 153 | 84 | 93 | 14 | 85 | 13 | 1.35 |
1973 | TEX | 22 | 20 | 5 | 9 | 5.61 | 57 | 6 | 1 | 0 | 118.2 | 130 | 74 | 77 | 8 | 66 | 5 | 1.65 |
1974 | TEX | 12 | 2 | 0 | 4 | 8.07 | 15 | 0 | 0 | 0 | 29.0 | 29 | 26 | 29 | 7 | 13 | 1 | 1.45 |
1975 | MIL | 38 | 32 | 14 | 16 | 4.13 | 100 | 7 | 2 | 0 | 220.1 | 219 | 101 | 114 | 18 | 106 | 16 | 1.48 |
1976 | MIL | 20 | 11 | 1 | 7 | 4.97 | 28 | 1 | 0 | 0 | 92.1 | 99 | 51 | 59 | 5 | 72 | 4 | 1.85 |
1977 | CHC | 22 | 0 | 1 | 2 | 4.75 | 20 | 0 | 0 | 0 | 36.0 | 34 | 19 | 22 | 8 | 18 | 0 | 1.44 |
1978 | OAK | 35 | 26 | 10 | 12 | 4.62 | 94 | 2 | 0 | 0 | 165.2 | 174 | 85 | 101 | 16 | 65 | 3 | 1.44 |
| Career | 206 | 134 | 41 | 71 | 4.56 | 536 | 26 | 6 | 1 | 963.0 | 942 | 488 | 552 | 86 | 478 | 52 | 1.47 |
Astros 
Mariners 
Rangers 
Athletics 
Angels 
BOS 
CIN 
Phillies 
Braves 
Brewers 
Cubs 
Dodgers 
Padres 
Yankees 
Orioles 
Guardians 
Royals 
PIT 
MIA 
WSH 
