| year | team name | league | level | mlb | # | age | w | l | era | g | gs | cg | sho | gr | gf | sv | ip | h | r | er | hr | bb | so | wp | bk | hb | whip | h9 | hr9 | bb9 | so9 | ra9 | so/bb |
| 1972 | Houston Astros | NL | MLB | HOU | 37 | 21 | 0 | 1 | 4.61 | 7 | 1 | 0 | 0 | 6 | 3 | 1 | 13.2 | 16 | 8 | 7 | 2 | 3 | 7 | 1 | 0 | 0 | 1.39 | 10.54 | 1.32 | 1.98 | 4.61 | 5.27 | 2.33 |
| 1973 | Houston Astros | NL | MLB | HOU | 37 | 22 | 1 | 1 | 1.80 | 13 | 0 | 0 | 0 | 13 | 2 | 0 | 10.0 | 11 | 2 | 2 | 1 | 8 | 2 | 1 | 0 | 0 | 1.90 | 9.90 | 0.90 | 7.20 | 1.80 | 1.80 | 0.25 |
| 1974 | Houston Astros | NL | MLB | HOU | 37 | 23 | 7 | 3 | 3.50 | 45 | 0 | 0 | 0 | 45 | 17 | 2 | 90.0 | 76 | 35 | 35 | 2 | 39 | 47 | 3 | 0 | 1 | 1.28 | 7.60 | 0.20 | 3.90 | 4.70 | 3.50 | 1.21 |
| 1975 | Houston Astros | NL | MLB | HOU | 37 | 24 | 1 | 2 | 3.03 | 32 | 3 | 1 | 0 | 29 | 13 | 5 | 71.1 | 62 | 24 | 24 | 2 | 37 | 32 | 6 | 1 | 0 | 1.39 | 7.82 | 0.25 | 4.67 | 4.04 | 3.03 | 0.86 |
| 1976 | Houston Astros | NL | MLB | HOU | 37 | 25 | 3 | 4 | 5.52 | 22 | 16 | 1 | 1 | 6 | 1 | 0 | 89.2 | 106 | 63 | 55 | 6 | 58 | 34 | 5 | 0 | 2 | 1.83 | 10.64 | 0.60 | 5.82 | 3.41 | 6.32 | 0.59 |
| 1977 | Cocoa Astros | FSL | A+ | HOU | - | 26 | 3 | 5 | 3.60 | 9 | 9 | 5 | 0 | 0 | 0 | 0 | 65.0 | 56 | 36 | 26 | 1 | 48 | 39 | 10 | 0 | 0 | 1.60 | 7.75 | 0.14 | 6.65 | 5.40 | 4.98 | 0.81 |
| 1977 | Columbus Astros | Sou | AA | HOU | - | 26 | 0 | 1 | 12.00 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 6.0 | 9 | 12 | 8 | 4 | 8 | 4 | 0 | 0 | 0 | 2.83 | 13.50 | 6.00 | 12.00 | 6.00 | 18.00 | 0.50 |
| 1977 | Charleston Charlies | IL | AAA | HOU | - | 26 | 1 | 3 | 6.62 | 15 | 3 | 0 | 0 | 12 | 0 | 0 | 34.0 | 43 | 28 | 25 | 2 | 22 | 15 | 8 | 0 | 0 | 1.91 | 11.38 | 0.53 | 5.82 | 3.97 | 7.41 | 0.68 |
| Tot: | MLB (5 yrs) | MLB | 12 | 11 | 4.03 | 119 | 20 | 2 | 1 | 36 | 99 | 8 | 274.2 | 271 | 132 | 123 | 13 | 145 | 122 | 16 | 1 | 3 | 1.51 | 8.88 | 0.43 | 4.75 | 4.00 | 4.33 | 0.84 | ||||
| Tot: | NL (5 yrs) | NL | 12 | 11 | 4.03 | 119 | 20 | 2 | 1 | 36 | 99 | 8 | 274.2 | 271 | 132 | 123 | 13 | 145 | 122 | 16 | 1 | 3 | 1.51 | 8.88 | 0.43 | 4.75 | 4.00 | 4.33 | 0.84 | ||||
| Tot: | Minors (1 yrs) | Minors | 4 | 9 | 5.06 | 26 | 14 | 5 | 0 | 0 | 12 | 0 | 105.0 | 108 | 76 | 59 | 7 | 78 | 58 | 18 | 0 | 0 | 1.77 | 9.26 | 0.60 | 6.69 | 4.97 | 6.51 | 0.74 | ||||
| Tot: | A+ (1 yrs) | A+ | 3 | 5 | 3.60 | 9 | 9 | 5 | 0 | 0 | 0 | 0 | 65.0 | 56 | 36 | 26 | 1 | 48 | 39 | 10 | 0 | 0 | 1.60 | 7.75 | 0.14 | 6.65 | 5.40 | 4.98 | 0.81 | ||||
| Tot: | AA (1 yrs) | AA | 0 | 1 | 12.00 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 6.0 | 9 | 12 | 8 | 4 | 8 | 4 | 0 | 0 | 0 | 2.83 | 13.50 | 6.00 | 12.00 | 6.00 | 18.00 | 0.50 | ||||
| Tot: | AAA (1 yrs) | AAA | 1 | 3 | 6.62 | 15 | 3 | 0 | 0 | 0 | 12 | 0 | 34.0 | 43 | 28 | 25 | 2 | 22 | 15 | 8 | 0 | 0 | 1.91 | 11.38 | 0.53 | 5.82 | 3.97 | 7.41 | 0.68 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| year | team name | league | level | mlb | # | age | pos | tbc+ | g | ab | r | h | 2b | 3b | hr | rbi | sb | cs | bb | so | hbp | sh | sf | ibb | gdp | tb | pa | xbh | 1b | avg | obp | slg | ops | seca | iso | babip | bb% | so% | so/bb | ab/hr |
| 1972 | Houston Astros | NL | MLB | HOU | 37 | 21 | P | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 33.33 | 0.00 | 0.00 | |
| 1974 | Houston Astros | NL | MLB | HOU | 37 | 23 | P | 45 | 18 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 | 0 | 2 | 0 | 0 | 0 | 1 | 22 | 0 | 1 | .056 | .150 | .056 | .206 | .111 | .000 | .083 | 9.09 | 27.27 | 3.00 | 0.00 | |
| 1975 | Houston Astros | NL | MLB | HOU | 37 | 24 | P | 32 | 13 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 3 | 15 | 1 | 1 | .154 | .154 | .231 | .385 | .077 | .077 | .167 | 0.00 | 6.67 | 0.00 | 0.00 | |
| 1976 | Houston Astros | NL | MLB | HOU | 37 | 25 | P | 22 | 23 | 1 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 6 | 0 | 5 | 0 | 0 | 0 | 2 | 30 | 0 | 2 | .087 | .160 | .087 | .247 | .087 | .000 | .118 | 6.67 | 20.00 | 3.00 | 0.00 | |
| Tot: | MLB (4 yrs) | MLB | 106 | 56 | 2 | 5 | 1 | 0 | 0 | 1 | 0 | 0 | 4 | 14 | 0 | 10 | 0 | 0 | 1 | 6 | 70 | 1 | 4 | .089 | .150 | .107 | .257 | .089 | .018 | .119 | 5.71 | 20.00 | 3.50 | |||||||
| Tot: | NL (4 yrs) | NL | 106 | 56 | 2 | 5 | 1 | 0 | 0 | 1 | 0 | 0 | 4 | 14 | 0 | 10 | 0 | 0 | 1 | 6 | 70 | 1 | 4 | .089 | .150 | .107 | .257 | .089 | .018 | .119 | 5.71 | 20.00 | 3.50 | |||||||
| Tot: | Minors (1 yrs) | Minors | 28 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Tot: | A+ (1 yrs) | A+ | 11 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Tot: | AA (1 yrs) | AA | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Tot: | AAA (1 yrs) | AAA | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||||||||||
| Avg: | MLB - 162 game avg | MLB | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||||
| Avg: | Minors - 162 game avg | College | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 31 | 20 | 57 | 16 | 57 | 50 | .479 |