Regular Season
| Season | TM | G | GS | W | L | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1975 | TEX | 56 | 12 | 8 | 7 | 4.12 | 50 | 3 | 2 | 2 | 131.0 | 134 | 60 | 63 | 11 | 59 | 2 | 1.47 |
1976 | TEX | 30 | 30 | 10 | 12 | 3.15 | 105 | 10 | 3 | 0 | 197.1 | 208 | 69 | 86 | 12 | 54 | 2 | 1.33 |
1977 | OAK | 12 | 8 | 1 | 5 | 6.55 | 24 | 1 | 0 | 0 | 44.0 | 62 | 32 | 40 | 3 | 28 | 4 | 2.05 |
1977 | TEX | 3 | 2 | 1 | 1 | 5.54 | 5 | 0 | 0 | 0 | 13.0 | 14 | 8 | 8 | 2 | 4 | 0 | 1.38 |
1977 | TOT | 15 | 10 | 2 | 6 | 6.32 | 29 | 1 | 0 | 0 | 57.0 | 76 | 40 | 48 | 5 | 32 | 4 | 1.89 |
1978 | TEX | 32 | 9 | 5 | 8 | 4.88 | 60 | 1 | 0 | 1 | 97.2 | 116 | 53 | 58 | 9 | 36 | 2 | 1.56 |
| Career | 133 | 61 | 25 | 33 | 4.14 | 244 | 15 | 5 | 3 | 483.0 | 534 | 222 | 255 | 37 | 181 | 10 | 1.48 |
Astros 
Mariners 
Rangers 
Athletics 
Angels 
BOS 
CIN 
Phillies 
Braves 
Brewers 
Cubs 
Dodgers 
Padres 
Yankees 
Orioles 
Guardians 
Royals 
PIT 
MIA 
WSH 
