Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1970 | WSH | 24 | 5 | 2 | 2 | 3.95 | 47 | 1 | 0 | 0 | 57.0 | 49 | 25 | 28 | 8 | 37 | 0 | 1.51 |
1971 | WSH | 14 | 9 | 3 | 4 | 5.94 | 21 | 0 | 0 | 0 | 47.0 | 60 | 31 | 34 | 9 | 27 | 1 | 1.85 |
1973 | TEX | 25 | 3 | 5 | 5 | 3.91 | 45 | 2 | 1 | 2 | 66.2 | 82 | 29 | 31 | 7 | 25 | 2 | 1.61 |
1974 | TEX | 35 | 26 | 13 | 12 | 3.57 | 134 | 9 | 2 | 0 | 216.2 | 219 | 86 | 97 | 13 | 74 | 4 | 1.35 |
1975 | TEX | 17 | 7 | 5 | 5 | 4.22 | 35 | 2 | 1 | 0 | 70.1 | 70 | 33 | 37 | 7 | 35 | 2 | 1.49 |
1975 | CLE | 25 | 3 | 1 | 2 | 4.28 | 41 | 1 | 0 | 1 | 69.1 | 72 | 33 | 40 | 9 | 29 | 0 | 1.46 |
1975 | TOT | 42 | 10 | 6 | 7 | 4.25 | 76 | 3 | 1 | 1 | 139.2 | 142 | 66 | 77 | 16 | 64 | 2 | 1.47 |
1976 | CLE | 32 | 27 | 9 | 11 | 4.25 | 104 | 5 | 2 | 0 | 180.0 | 193 | 85 | 94 | 14 | 55 | 7 | 1.38 |
1977 | MON | 42 | 25 | 9 | 12 | 4.51 | 89 | 6 | 2 | 0 | 185.2 | 189 | 93 | 99 | 15 | 71 | 4 | 1.40 |
| Career | 214 | 105 | 47 | 53 | 4.18 | 516 | 26 | 8 | 3 | 892.2 | 934 | 415 | 460 | 82 | 353 | 20 | 1.44 |
Astros 
Mariners 
Rangers 
Athletics 
Angels 
BOS 
CIN 
Phillies 
Braves 
Brewers 
Cubs 
Dodgers 
Padres 
Yankees 
Orioles 
Guardians 
Royals 
PIT 
MIA 
WSH 
