| 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 |
| 1978 | Northern Colorado | IndyNCAA | NCAA-1 | 21 | 8 | 5 | 4.37 | 13 | 11 | 8 | 0 | 2 | 0 | 0 | 80.1 | 76 | 54 | 39 | 0 | 51 | 78 | 0 | 0 | 0 | 1.58 | 8.51 | 0.00 | 5.71 | 8.74 | 6.05 | 1.53 | ||
| 1979 | Northern Colorado | IndyNCAA | NCAA-1 | 22 | 7 | 2 | 2.34 | 10 | 10 | 8 | 0 | 0 | 0 | 0 | 77.0 | 65 | 37 | 20 | 0 | 29 | 73 | 0 | 0 | 0 | 1.22 | 7.60 | 0.00 | 3.39 | 8.53 | 4.32 | 2.52 | ||
| 1979 | Burlington Bees | Midw | A | MIL | - | 22 | 2 | 1 | 1.97 | 5 | 0 | 0 | 0 | 5 | 0 | 0 | 32.0 | 21 | 11 | 7 | 0 | 15 | 23 | 3 | 0 | 0 | 1.13 | 5.91 | 0.00 | 4.22 | 6.47 | 3.09 | 1.53 |
| 1980 | Stockton Ports | Calif | A+ | MIL | - | 23 | 12 | 4 | 1.95 | 29 | 12 | 5 | 0 | 17 | 0 | 2 | 134.0 | 88 | 46 | 29 | 4 | 63 | 92 | 5 | 0 | 3 | 1.13 | 5.91 | 0.27 | 4.23 | 6.18 | 3.09 | 1.46 |
| 1981 | El Paso Diablos | Tex | AA | MIL | - | 24 | 6 | 8 | 5.69 | 22 | 22 | 2 | 0 | 0 | 0 | 0 | 125.0 | 154 | 94 | 79 | 13 | 40 | 140 | 13 | 1 | 1 | 1.55 | 11.09 | 0.94 | 2.88 | 10.08 | 6.77 | 3.50 |
| 1982 | Vancouver Canadians | PCL | AAA | MIL | - | 25 | 3 | 8 | 7.03 | 18 | 18 | 1 | 0 | 0 | 0 | 0 | 80.2 | 92 | 69 | 63 | 3 | 60 | 41 | 8 | 0 | 1 | 1.88 | 10.26 | 0.33 | 6.69 | 4.57 | 7.70 | 0.68 |
| 1983 | Tucson Toros | PCL | AAA | HOU | - | 26 | 1 | 1 | 3.68 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 22.0 | 25 | 9 | 9 | 1 | 8 | 15 | 2 | 0 | 0 | 1.50 | 10.23 | 0.41 | 3.27 | 6.14 | 3.68 | 1.88 |
| 1983 | Houston Astros | NL | MLB | HOU | 53 | 26 | 9 | 5 | 3.14 | 28 | 13 | 0 | 0 | 15 | 7 | 0 | 94.2 | 76 | 37 | 33 | 4 | 45 | 44 | 2 | 3 | 1 | 1.28 | 7.23 | 0.38 | 4.28 | 4.18 | 3.52 | 0.98 |
| 1984 | Tucson Toros | PCL | AAA | HOU | - | 27 | 4 | 3 | 4.30 | 11 | 11 | 2 | 1 | 0 | 0 | 0 | 60.2 | 60 | 29 | 29 | 2 | 30 | 38 | 4 | 0 | 0 | 1.48 | 8.90 | 0.30 | 4.45 | 5.64 | 4.30 | 1.27 |
| 1984 | Houston Astros | NL | MLB | HOU | 53 | 27 | 2 | 3 | 5.53 | 17 | 7 | 0 | 0 | 10 | 2 | 0 | 40.2 | 46 | 27 | 25 | 1 | 35 | 29 | 1 | 0 | 0 | 1.99 | 10.18 | 0.22 | 7.75 | 6.42 | 5.98 | 0.83 |
| 1985 | Tucson Toros | PCL | AAA | HOU | - | 28 | 2 | 0 | 3.52 | 6 | 3 | 0 | 0 | 3 | 1 | 0 | 23.0 | 24 | 11 | 9 | 1 | 11 | 14 | 1 | 0 | 0 | 1.52 | 9.39 | 0.39 | 4.30 | 5.48 | 4.30 | 1.27 |
| 1985 | Houston Astros | NL | MLB | HOU | 53 | 28 | 0 | 0 | 4.26 | 13 | 0 | 0 | 0 | 13 | 4 | 0 | 19.0 | 29 | 15 | 9 | 1 | 11 | 16 | 1 | 0 | 0 | 2.11 | 13.74 | 0.47 | 5.21 | 7.58 | 7.11 | 1.45 |
| 1986 | Houston Astros | NL | MLB | HOU | 53 | 29 | 1 | 2 | 4.08 | 13 | 6 | 0 | 0 | 7 | 1 | 0 | 39.2 | 47 | 20 | 18 | 3 | 22 | 30 | 5 | 0 | 0 | 1.74 | 10.66 | 0.68 | 4.99 | 6.81 | 4.54 | 1.36 |
| Tot: | MLB (4 yrs) | MLB | 12 | 10 | 3.94 | 71 | 26 | 0 | 0 | 14 | 45 | 0 | 194.0 | 198 | 99 | 85 | 9 | 113 | 119 | 9 | 3 | 1 | 1.60 | 9.19 | 0.42 | 5.24 | 5.52 | 4.59 | 1.05 | ||||
| Tot: | NL (4 yrs) | NL | 12 | 10 | 3.94 | 71 | 26 | 0 | 0 | 14 | 45 | 0 | 194.0 | 198 | 99 | 85 | 9 | 113 | 119 | 9 | 3 | 1 | 1.60 | 9.19 | 0.42 | 5.24 | 5.52 | 4.59 | 1.05 | ||||
| Tot: | Minors (7 yrs) | Minors | 30 | 25 | 4.24 | 95 | 70 | 10 | 1 | 1 | 25 | 2 | 477.1 | 464 | 269 | 225 | 24 | 227 | 363 | 36 | 1 | 5 | 1.45 | 8.75 | 0.45 | 4.28 | 6.84 | 5.07 | 1.60 | ||||
| Tot: | A (1 yrs) | A | 2 | 1 | 1.97 | 5 | 0 | 0 | 0 | 0 | 5 | 0 | 32.0 | 21 | 11 | 7 | 0 | 15 | 23 | 3 | 0 | 0 | 1.12 | 5.91 | 0.00 | 4.22 | 6.47 | 3.09 | 1.53 | ||||
| Tot: | A+ (1 yrs) | A+ | 12 | 4 | 1.95 | 29 | 12 | 5 | 0 | 0 | 17 | 2 | 134.0 | 88 | 46 | 29 | 4 | 63 | 92 | 5 | 0 | 3 | 1.13 | 5.91 | 0.27 | 4.23 | 6.18 | 3.09 | 1.46 | ||||
| Tot: | AA (1 yrs) | AA | 6 | 8 | 5.69 | 22 | 22 | 2 | 0 | 0 | 0 | 0 | 125.0 | 154 | 94 | 79 | 13 | 40 | 140 | 13 | 1 | 1 | 1.55 | 11.09 | 0.94 | 2.88 | 10.08 | 6.77 | 3.50 | ||||
| Tot: | AAA (4 yrs) | AAA | 10 | 12 | 5.31 | 39 | 36 | 3 | 1 | 1 | 3 | 0 | 186.1 | 201 | 118 | 110 | 7 | 109 | 108 | 15 | 0 | 1 | 1.66 | 9.71 | 0.34 | 5.26 | 5.22 | 5.70 | 0.99 | ||||
| Tot: | College (2 yrs) | College | 15 | 7 | 3.37 | 23 | 21 | 16 | 0 | 0 | 2 | 0 | 157.1 | 141 | 91 | 59 | 0 | 80 | 151 | 0 | 0 | 0 | 1.40 | 8.07 | 0.00 | 4.58 | 8.64 | 5.21 | 1.89 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | College - 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 |
| 1983 | Tucson Toros | PCL | AAA | HOU | - | 26 | P | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 100.00 | 0.00 | 0.00 | |
| 1983 | Houston Astros | NL | MLB | HOU | 53 | 26 | P | 28 | 22 | 0 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 12 | 0 | 6 | 0 | 0 | 0 | 1 | 29 | 0 | 1 | .045 | .087 | .045 | .132 | .045 | .000 | .100 | 3.45 | 41.38 | 12.00 | 0.00 | |
| 1984 | Tucson Toros | PCL | AAA | HOU | - | 27 | P | 12 | 14 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 2 | 0 | 0 | 0 | 0 | 16 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 50.00 | 0.00 | 0.00 | |
| 1984 | Houston Astros | NL | MLB | HOU | 53 | 27 | P | 17 | 6 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 7 | 0 | 2 | .333 | .429 | .333 | .762 | .167 | .000 | .667 | 14.29 | 42.86 | 3.00 | 0.00 | |
| 1985 | Tucson Toros | PCL | AAA | HOU | - | 28 | P | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 83.33 | 0.00 | 0.00 | |
| 1986 | Houston Astros | NL | MLB | HOU | 53 | 29 | P | 13 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 0 | 4 | 0 | 0 | 0 | 0 | 14 | 0 | 0 | .000 | .100 | .000 | .100 | .111 | .000 | .000 | 7.14 | 57.14 | 8.00 | 0.00 | |
| Tot: | MLB (3 yrs) | MLB | 58 | 37 | 1 | 3 | 0 | 0 | 0 | 2 | 0 | 0 | 3 | 23 | 0 | 10 | 0 | 0 | 0 | 3 | 50 | 0 | 3 | .081 | .150 | .081 | .231 | .081 | .000 | .214 | 6.00 | 46.00 | 7.67 | |||||||
| Tot: | NL (3 yrs) | NL | 58 | 37 | 1 | 3 | 0 | 0 | 0 | 2 | 0 | 0 | 3 | 23 | 0 | 10 | 0 | 0 | 0 | 3 | 50 | 0 | 3 | .081 | .150 | .081 | .231 | .081 | .000 | .214 | 6.00 | 46.00 | 7.67 | |||||||
| Tot: | Minors (3 yrs) | Minors | 22 | 22 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 2 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 62.50 | ||||||||
| Tot: | AAA (3 yrs) | AAA | 22 | 22 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 2 | 0 | 0 | 0 | 0 | 24 | 0 | 0 | .000 | .000 | .000 | .000 | .000 | .000 | .000 | 0.00 | 62.50 | ||||||||
| Avg: | MLB - 162 game avg | MLB | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||||
| Avg: | Minors - 162 game avg | College | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 62 | 38 | 43 | 46 | 43 | 35 | .502 |