| 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 | Bellingham Mariners | Nwst | A- | SEA | - | 19 | 3 | 3 | 5.00 | 10 | 9 | 0 | 0 | 1 | 0 | 0 | 54.0 | 58 | 32 | 30 | 7 | 32 | 47 | 8 | 0 | 4 | 1.67 | 9.67 | 1.17 | 5.33 | 7.83 | 5.33 | 1.47 |
| 1978 | Stockton Mariners | Calif | A+ | SEA | - | 19 | 1 | 5 | 4.73 | 12 | 6 | 1 | 1 | 6 | 0 | 0 | 40.0 | 42 | 37 | 21 | 4 | 33 | 32 | 5 | 0 | 1 | 1.88 | 9.45 | 0.90 | 7.43 | 7.20 | 8.33 | 0.97 |
| 1979 | Alexandria Mariners | Caro | A+ | SEA | - | 20 | 8 | 11 | 3.23 | 24 | 24 | 8 | 0 | 0 | 0 | 0 | 167.0 | 150 | 74 | 60 | 6 | 85 | 108 | 10 | 0 | 8 | 1.41 | 8.08 | 0.32 | 4.58 | 5.82 | 3.99 | 1.27 |
| 1980 | Lynn Sailors | East | AA | SEA | - | 21 | 9 | 14 | 5.55 | 26 | 26 | 5 | 0 | 0 | 0 | 0 | 154.0 | 144 | 116 | 95 | 10 | 106 | 92 | 8 | 0 | 4 | 1.62 | 8.42 | 0.58 | 6.19 | 5.38 | 6.78 | 0.87 |
| 1981 | Lynn Sailors | East | AA | SEA | - | 22 | 4 | 4 | 3.80 | 13 | 13 | 1 | 1 | 0 | 0 | 0 | 71.0 | 73 | 37 | 30 | 7 | 31 | 50 | 2 | 0 | 1 | 1.46 | 9.25 | 0.89 | 3.93 | 6.34 | 4.69 | 1.61 |
| 1982 | Lynn Sailors | East | AA | SEA | - | 23 | 9 | 4 | 3.45 | 21 | 21 | 9 | 2 | 0 | 0 | 0 | 138.1 | 104 | 63 | 53 | 8 | 90 | 125 | 6 | 0 | 4 | 1.40 | 6.77 | 0.52 | 5.86 | 8.13 | 4.10 | 1.39 |
| 1983 | Salt Lake Gulls | PCL | AAA | SEA | - | 24 | 7 | 4 | 4.82 | 51 | 1 | 0 | 0 | 50 | 12 | 2 | 84.0 | 86 | 51 | 45 | 10 | 64 | 108 | 8 | 0 | 3 | 1.79 | 9.21 | 1.07 | 6.86 | 11.57 | 5.46 | 1.69 |
| 1983 | Seattle Mariners | AL | MLB | SEA | 39 | 24 | 0 | 1 | 13.50 | 4 | 0 | 0 | 0 | 4 | 0 | 0 | 5.1 | 14 | 9 | 8 | 2 | 5 | 3 | 1 | 0 | 2 | 3.56 | 23.63 | 3.38 | 8.44 | 5.06 | 15.19 | 0.60 |
| 1984 | Salt Lake Gulls | PCL | AAA | SEA | - | 25 | 6 | 5 | 5.21 | 46 | 0 | 0 | 0 | 46 | 26 | 8 | 76.0 | 69 | 52 | 44 | 7 | 55 | 77 | 5 | 0 | 2 | 1.63 | 8.17 | 0.83 | 6.51 | 9.12 | 6.16 | 1.40 |
| 1984 | Seattle Mariners | AL | MLB | SEA | 39 | 25 | 1 | 1 | 3.00 | 5 | 0 | 0 | 0 | 5 | 2 | 0 | 6.0 | 7 | 2 | 2 | 0 | 0 | 6 | 0 | 0 | 0 | 1.17 | 10.50 | 0.00 | 0.00 | 9.00 | 3.00 | 0.00 |
| 1985 | Calgary Cannons | PCL | AAA | SEA | - | 26 | 0 | 0 | 0.00 | 4 | 0 | 0 | 0 | 4 | 2 | 0 | 5.1 | 2 | 1 | 0 | 0 | 4 | 8 | 0 | 0 | 0 | 1.13 | 3.38 | 0.00 | 6.75 | 13.50 | 1.69 | 2.00 |
| 1985 | Seattle Mariners | AL | MLB | SEA | 39 | 26 | 2 | 1 | 1.95 | 15 | 0 | 0 | 0 | 15 | 7 | 4 | 32.1 | 25 | 9 | 7 | 1 | 6 | 32 | 0 | 0 | 1 | 0.96 | 6.96 | 0.28 | 1.67 | 8.91 | 2.51 | 5.33 |
| 1986 | Calgary Cannons | PCL | AAA | SEA | - | 27 | 0 | 1 | 1.59 | 16 | 0 | 0 | 0 | 16 | 12 | 1 | 17.0 | 16 | 6 | 3 | 1 | 12 | 20 | 1 | 0 | 0 | 1.65 | 8.47 | 0.53 | 6.35 | 10.59 | 3.18 | 1.67 |
| 1986 | Seattle Mariners | AL | MLB | SEA | 39 | 27 | 2 | 3 | 4.04 | 26 | 0 | 0 | 0 | 26 | 15 | 1 | 35.2 | 35 | 19 | 16 | 3 | 21 | 23 | 2 | 1 | 1 | 1.57 | 8.83 | 0.76 | 5.30 | 5.80 | 4.79 | 1.10 |
| 1987 | Toledo Mud Hens | IL | AAA | DET | - | 28 | 3 | 5 | 2.68 | 28 | 0 | 0 | 0 | 28 | 23 | 10 | 40.1 | 34 | 12 | 12 | 1 | 19 | 43 | 2 | 0 | 0 | 1.31 | 7.59 | 0.22 | 4.24 | 9.60 | 2.68 | 2.26 |
| 1987 | Calgary Cannons | PCL | AAA | SEA | - | 28 | 2 | 6 | 4.34 | 27 | 0 | 0 | 0 | 27 | 17 | 5 | 37.1 | 34 | 23 | 18 | 5 | 27 | 35 | 4 | 0 | 0 | 1.63 | 8.20 | 1.21 | 6.51 | 8.44 | 5.54 | 1.30 |
| 1988 | Portland Beavers | PCL | AAA | MIN | - | 29 | 0 | 3 | 4.32 | 39 | 0 | 0 | 0 | 39 | 34 | 21 | 41.2 | 36 | 22 | 20 | 6 | 17 | 34 | 1 | 0 | 0 | 1.27 | 7.78 | 1.30 | 3.67 | 7.34 | 4.75 | 2.00 |
| 1988 | Minnesota Twins | AL | MLB | MIN | 38 | 29 | 0 | 0 | 6.00 | 11 | 0 | 0 | 0 | 11 | 8 | 0 | 12.0 | 15 | 9 | 8 | 1 | 7 | 9 | 0 | 1 | 0 | 1.83 | 11.25 | 0.75 | 5.25 | 6.75 | 6.75 | 1.29 |
| Tot: | MLB (5 yrs) | MLB | 5 | 6 | 4.04 | 61 | 0 | 0 | 0 | 32 | 61 | 5 | 91.1 | 96 | 48 | 41 | 7 | 39 | 73 | 3 | 2 | 4 | 1.48 | 9.46 | 0.69 | 3.84 | 7.19 | 4.73 | 1.87 | ||||
| Tot: | AL (5 yrs) | AL | 5 | 6 | 4.04 | 61 | 0 | 0 | 0 | 32 | 61 | 5 | 91.1 | 96 | 48 | 41 | 7 | 39 | 73 | 3 | 2 | 4 | 1.48 | 9.46 | 0.69 | 3.84 | 7.19 | 4.73 | 1.87 | ||||
| Tot: | Minors (11 yrs) | Minors | 52 | 65 | 4.19 | 317 | 100 | 24 | 4 | 126 | 217 | 47 | 926.0 | 848 | 526 | 431 | 72 | 575 | 779 | 60 | 0 | 27 | 1.54 | 8.24 | 0.70 | 5.59 | 7.57 | 5.11 | 1.35 | ||||
| Tot: | A- (1 yrs) | A- | 3 | 3 | 5.00 | 10 | 9 | 0 | 0 | 0 | 1 | 0 | 54.0 | 58 | 32 | 30 | 7 | 32 | 47 | 8 | 0 | 4 | 1.67 | 9.67 | 1.17 | 5.33 | 7.83 | 5.33 | 1.47 | ||||
| Tot: | A+ (2 yrs) | A+ | 9 | 16 | 3.52 | 36 | 30 | 9 | 1 | 0 | 6 | 0 | 207.0 | 192 | 111 | 81 | 10 | 118 | 140 | 15 | 0 | 9 | 1.50 | 8.35 | 0.43 | 5.13 | 6.09 | 4.83 | 1.19 | ||||
| Tot: | AA (3 yrs) | AA | 22 | 22 | 4.41 | 60 | 60 | 15 | 3 | 0 | 0 | 0 | 363.1 | 321 | 216 | 178 | 25 | 227 | 267 | 16 | 0 | 9 | 1.51 | 7.95 | 0.62 | 5.62 | 6.61 | 5.35 | 1.18 | ||||
| Tot: | AAA (6 yrs) | AAA | 18 | 24 | 4.24 | 211 | 1 | 0 | 0 | 126 | 210 | 47 | 301.2 | 277 | 167 | 142 | 30 | 198 | 325 | 21 | 0 | 5 | 1.57 | 8.26 | 0.90 | 5.91 | 9.70 | 4.98 | 1.64 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 76 | 31 | 65 | 51 | 65 | 56 | .486 |