| 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 |
| 1973 | Houston Astros | NL | MLB | HOU | 46 | 21 | 0 | 1 | 5.54 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 13.0 | 12 | 8 | 8 | 0 | 4 | 6 | 0 | 0 | 0 | 1.23 | 8.31 | 0.00 | 2.77 | 4.15 | 5.54 | 1.50 |
| 1974 | Houston Astros | NL | MLB | HOU | 46 | 22 | 0 | 3 | 7.88 | 6 | 3 | 0 | 0 | 3 | 1 | 0 | 16.0 | 18 | 15 | 14 | 0 | 12 | 8 | 2 | 1 | 2 | 1.88 | 10.13 | 0.00 | 6.75 | 4.50 | 8.44 | 0.67 |
| 1975 | Houston Astros | NL | MLB | HOU | 46 | 23 | 6 | 13 | 4.47 | 32 | 29 | 4 | 1 | 3 | 1 | 0 | 171.0 | 184 | 93 | 85 | 15 | 87 | 89 | 6 | 2 | 1 | 1.58 | 9.68 | 0.79 | 4.58 | 4.68 | 4.89 | 1.02 |
| 1976 | Memphis Blues | IL | AAA | HOU | - | 24 | 6 | 10 | 6.09 | 20 | 16 | 6 | 0 | 4 | 0 | 0 | 105.0 | 135 | 81 | 71 | 12 | 53 | 48 | 3 | 1 | 1 | 1.79 | 11.57 | 1.03 | 4.54 | 4.11 | 6.94 | 0.91 |
| 1977 | Houston Astros | NL | MLB | HOU | 46 | 25 | 1 | 1 | 6.00 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 21.0 | 26 | 15 | 14 | 1 | 8 | 7 | 0 | 0 | 1 | 1.62 | 11.14 | 0.43 | 3.43 | 3.00 | 6.43 | 0.88 |
| 1978 | Daytona Astros | FSL | A+ | HOU | - | 26 | 1 | 0 | 3.00 | 3 | 1 | 0 | 0 | 2 | 0 | 0 | 12.0 | 13 | 4 | 4 | 0 | 8 | 7 | 3 | 0 | 0 | 1.75 | 9.75 | 0.00 | 6.00 | 5.25 | 3.00 | 0.88 |
| Tot: | MLB (4 yrs) | MLB | 7 | 18 | 4.93 | 44 | 38 | 4 | 1 | 2 | 6 | 0 | 221.0 | 240 | 131 | 121 | 16 | 111 | 110 | 8 | 3 | 4 | 1.59 | 9.77 | 0.65 | 4.52 | 4.48 | 5.33 | 0.99 | ||||
| Tot: | NL (4 yrs) | NL | 7 | 18 | 4.93 | 44 | 38 | 4 | 1 | 2 | 6 | 0 | 221.0 | 240 | 131 | 121 | 16 | 111 | 110 | 8 | 3 | 4 | 1.59 | 9.77 | 0.65 | 4.52 | 4.48 | 5.33 | 0.99 | ||||
| Tot: | Minors (2 yrs) | Minors | 7 | 10 | 5.77 | 23 | 17 | 6 | 0 | 0 | 6 | 0 | 117.0 | 148 | 85 | 75 | 12 | 61 | 55 | 6 | 1 | 1 | 1.79 | 11.38 | 0.92 | 4.69 | 4.23 | 6.54 | 0.90 | ||||
| Tot: | A+ (1 yrs) | A+ | 1 | 0 | 3.00 | 3 | 1 | 0 | 0 | 0 | 2 | 0 | 12.0 | 13 | 4 | 4 | 0 | 8 | 7 | 3 | 0 | 0 | 1.75 | 9.75 | 0.00 | 6.00 | 5.25 | 3.00 | 0.88 | ||||
| Tot: | AAA (1 yrs) | AAA | 6 | 10 | 6.09 | 20 | 16 | 6 | 0 | 0 | 4 | 0 | 105.0 | 135 | 81 | 71 | 12 | 53 | 48 | 3 | 1 | 1 | 1.79 | 11.57 | 1.03 | 4.54 | 4.11 | 6.94 | 0.91 | ||||
| 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 |
| 1973 | Houston Astros | NL | MLB | HOU | 46 | 21 | P | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 75.00 | 0.00 | 0.00 | |
| 1974 | Houston Astros | NL | MLB | HOU | 46 | 22 | P | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 25.00 | 0.00 | 0.00 | |
| 1975 | Houston Astros | NL | MLB | HOU | 46 | 23 | P | 32 | 50 | 2 | 8 | 2 | 0 | 0 | 4 | 0 | 0 | 3 | 24 | 0 | 5 | 0 | 0 | 2 | 10 | 58 | 2 | 6 | .160 | .208 | .200 | .408 | .100 | .040 | .308 | 5.17 | 41.38 | 8.00 | 0.00 | |
| 1977 | Houston Astros | NL | MLB | HOU | 46 | 25 | P | 4 | 7 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 1 | 8 | 0 | 1 | .143 | .143 | .143 | .286 | .000 | .000 | .250 | 0.00 | 37.50 | 0.00 | 0.00 | |
| Tot: | MLB (4 yrs) | MLB | 44 | 65 | 2 | 9 | 2 | 0 | 0 | 4 | 0 | 0 | 3 | 31 | 0 | 6 | 0 | 0 | 2 | 11 | 74 | 2 | 7 | .138 | .176 | .169 | .346 | .077 | .031 | .265 | 4.05 | 41.89 | 10.33 | |||||||
| Tot: | NL (4 yrs) | NL | 44 | 65 | 2 | 9 | 2 | 0 | 0 | 4 | 0 | 0 | 3 | 31 | 0 | 6 | 0 | 0 | 2 | 11 | 74 | 2 | 7 | .138 | .176 | .169 | .346 | .077 | .031 | .265 | 4.05 | 41.89 | 10.33 | |||||||
| Avg: | MLB - 162 game avg | MLB | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 27 | 27 | 17 | 14 | 17 | 31 | .455 |