| 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 |
| 1980 | Toledo Mud Hens | IL | AAA | MIN | - | 26 | 9 | 3 | 2.10 | 15 | 15 | 6 | 3 | 0 | 0 | 0 | 107.0 | 85 | 34 | 25 | 4 | 32 | 59 | 2 | 0 | 1 | 1.09 | 7.15 | 0.34 | 2.69 | 4.96 | 2.86 | 1.84 |
| 1980 | Minnesota Twins | AL | MLB | MIN | 27,28 | 26 | 6 | 2 | 3.51 | 18 | 9 | 3 | 0 | 9 | 5 | 1 | 77.0 | 73 | 33 | 30 | 9 | 30 | 35 | 3 | 1 | 0 | 1.34 | 8.53 | 1.05 | 3.51 | 4.09 | 3.86 | 1.17 |
| 1981 | Minnesota Twins | AL | MLB | MIN | 28 | 27 | 6 | 10 | 4.08 | 23 | 22 | 4 | 0 | 1 | 1 | 0 | 150.0 | 160 | 72 | 68 | 11 | 52 | 76 | 2 | 3 | 1 | 1.41 | 9.60 | 0.66 | 3.12 | 4.56 | 4.32 | 1.46 |
| 1982 | Toledo Mud Hens | IL | AAA | MIN | - | 28 | 3 | 0 | 2.14 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 21.0 | 13 | 5 | 5 | 2 | 7 | 14 | 0 | 0 | 1 | 0.95 | 5.57 | 0.86 | 3.00 | 6.00 | 2.14 | 2.00 |
| 1982 | Minnesota Twins | AL | MLB | MIN | 28 | 28 | 9 | 7 | 4.22 | 26 | 26 | 3 | 0 | 0 | 0 | 0 | 153.2 | 166 | 74 | 72 | 18 | 55 | 61 | 6 | 2 | 0 | 1.44 | 9.72 | 1.05 | 3.22 | 3.57 | 4.33 | 1.11 |
| 1983 | Minnesota Twins | AL | MLB | MIN | 28 | 29 | 11 | 14 | 4.14 | 36 | 29 | 4 | 1 | 7 | 3 | 1 | 193.1 | 196 | 105 | 89 | 21 | 68 | 68 | 4 | 3 | 4 | 1.37 | 9.12 | 0.98 | 3.17 | 3.17 | 4.89 | 1.00 |
| 1984 | Toledo Mud Hens | IL | AAA | MIN | - | 30 | 0 | 0 | 1.76 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 15.1 | 16 | 4 | 3 | 1 | 5 | 5 | 0 | 0 | 0 | 1.37 | 9.39 | 0.59 | 2.93 | 2.93 | 2.35 | 1.00 |
| 1984 | Minnesota Twins | AL | MLB | MIN | 28 | 30 | 3 | 5 | 5.77 | 17 | 11 | 1 | 0 | 6 | 3 | 0 | 68.2 | 75 | 46 | 44 | 9 | 22 | 22 | 3 | 0 | 7 | 1.41 | 9.83 | 1.18 | 2.88 | 2.88 | 6.03 | 1.00 |
| 1985 | Columbus Clippers | IL | AAA | NYA | - | 31 | 3 | 5 | 4.40 | 26 | 16 | 0 | 0 | 10 | 2 | 0 | 106.1 | 115 | 62 | 52 | 6 | 52 | 38 | 6 | 0 | 0 | 1.57 | 9.73 | 0.51 | 4.40 | 3.22 | 5.25 | 0.73 |
| Tot: | MLB (5 yrs) | MLB | 35 | 38 | 4.24 | 120 | 97 | 15 | 1 | 12 | 23 | 2 | 642.2 | 670 | 330 | 303 | 68 | 227 | 262 | 18 | 9 | 12 | 1.40 | 9.38 | 0.95 | 3.18 | 3.67 | 4.62 | 1.15 | ||||
| Tot: | AL (5 yrs) | AL | 35 | 38 | 4.24 | 120 | 97 | 15 | 1 | 12 | 23 | 2 | 642.2 | 670 | 330 | 303 | 68 | 227 | 262 | 18 | 9 | 12 | 1.40 | 9.38 | 0.95 | 3.18 | 3.67 | 4.62 | 1.15 | ||||
| Tot: | Minors (4 yrs) | Minors | 15 | 8 | 3.06 | 47 | 37 | 7 | 3 | 2 | 10 | 0 | 249.2 | 229 | 105 | 85 | 13 | 96 | 116 | 8 | 0 | 2 | 1.30 | 8.26 | 0.47 | 3.46 | 4.18 | 3.79 | 1.21 | ||||
| Tot: | AAA (4 yrs) | AAA | 15 | 8 | 3.06 | 47 | 37 | 7 | 3 | 2 | 10 | 0 | 249.2 | 229 | 105 | 85 | 13 | 96 | 116 | 8 | 0 | 2 | 1.30 | 8.26 | 0.47 | 3.46 | 4.18 | 3.79 | 1.21 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 22 | 62 | 49 | 35 | 49 | 56 | .472 |