| 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 |
| 1974 | USC | Pac8 | NCAA-1 | 19 | 0 | 0 | 0.00 | 18 | 0 | 0 | 0 | 0 | 0 | 0 | 80.1 | 0 | 0 | 0 | 0 | 0 | 70 | 0 | 0 | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 7.84 | 0.00 | 0.00 | ||
| 1975 | USC | Pac8 | NCAA-1 | 20 | 9 | 3 | 1.24 | 18 | 13 | 7 | 0 | 5 | 0 | 0 | 108.2 | 81 | 24 | 15 | 0 | 27 | 120 | 0 | 0 | 0 | 0.99 | 6.71 | 0.00 | 2.24 | 9.94 | 1.99 | 4.44 | ||
| 1976 | Tacoma Twins | PCL | AAA | MIN | - | 21 | 2 | 1 | 2.67 | 4 | 4 | 2 | 0 | 0 | 0 | 0 | 27.0 | 23 | 8 | 8 | 2 | 9 | 18 | 0 | 0 | 1 | 1.19 | 7.67 | 0.67 | 3.00 | 6.00 | 2.67 | 2.00 |
| 1976 | Minnesota Twins | AL | MLB | MIN | 17 | 21 | 8 | 8 | 3.51 | 23 | 23 | 1 | 1 | 0 | 0 | 0 | 118.0 | 105 | 61 | 46 | 6 | 63 | 74 | 1 | 2 | 3 | 1.42 | 8.01 | 0.46 | 4.81 | 5.64 | 4.65 | 1.17 |
| 1977 | Minnesota Twins | AL | MLB | MIN | 17 | 22 | 6 | 9 | 5.18 | 30 | 28 | 1 | 0 | 2 | 2 | 0 | 137.1 | 164 | 89 | 79 | 13 | 66 | 73 | 2 | 2 | 4 | 1.67 | 10.75 | 0.85 | 4.33 | 4.78 | 5.83 | 1.11 |
| 1978 | Toledo Mud Hens | IL | AAA | MIN | - | 23 | 9 | 8 | 3.73 | 20 | 20 | 7 | 1 | 0 | 0 | 0 | 128.0 | 105 | 58 | 53 | 9 | 59 | 81 | 4 | 0 | 2 | 1.28 | 7.38 | 0.63 | 4.15 | 5.70 | 4.08 | 1.37 |
| 1978 | Minnesota Twins | AL | MLB | MIN | 17 | 23 | 0 | 2 | 6.52 | 3 | 2 | 0 | 0 | 1 | 0 | 0 | 9.2 | 10 | 12 | 7 | 2 | 6 | 4 | 0 | 0 | 0 | 1.66 | 9.31 | 1.86 | 5.59 | 3.72 | 11.17 | 0.67 |
| 1979 | Minnesota Twins | AL | MLB | MIN | 17 | 24 | 7 | 3 | 3.49 | 40 | 6 | 0 | 0 | 34 | 13 | 1 | 108.1 | 106 | 45 | 42 | 8 | 35 | 85 | 5 | 1 | 1 | 1.30 | 8.81 | 0.66 | 2.91 | 7.06 | 3.74 | 2.43 |
| 1980 | Minnesota Twins | AL | MLB | MIN | 17 | 25 | 7 | 7 | 4.56 | 23 | 16 | 2 | 0 | 7 | 3 | 2 | 104.2 | 117 | 58 | 53 | 11 | 33 | 73 | 2 | 0 | 0 | 1.43 | 10.06 | 0.95 | 2.84 | 6.28 | 4.99 | 2.21 |
| 1981 | Minnesota Twins | AL | MLB | MIN | 17 | 26 | 9 | 8 | 4.07 | 24 | 23 | 3 | 0 | 1 | 0 | 0 | 141.2 | 140 | 70 | 64 | 12 | 52 | 77 | 2 | 1 | 2 | 1.36 | 8.89 | 0.76 | 3.30 | 4.89 | 4.45 | 1.48 |
| 1982 | Minnesota Twins | AL | MLB | MIN | 17 | 27 | 5 | 11 | 6.58 | 27 | 13 | 2 | 0 | 14 | 5 | 0 | 94.1 | 122 | 74 | 69 | 16 | 51 | 40 | 4 | 0 | 1 | 1.83 | 11.64 | 1.53 | 4.87 | 3.82 | 7.06 | 0.78 |
| 1983 | Albuquerque Dukes | PCL | AAA | LAN | - | 28 | 0 | 0 | 11.25 | 6 | 2 | 0 | 0 | 4 | 2 | 0 | 8.0 | 14 | 10 | 10 | 1 | 7 | 2 | 2 | 0 | 0 | 2.63 | 15.75 | 1.13 | 7.88 | 2.25 | 11.25 | 0.29 |
| Tot: | MLB (7 yrs) | MLB | 42 | 48 | 4.54 | 170 | 111 | 9 | 1 | 23 | 59 | 3 | 714.0 | 764 | 409 | 360 | 68 | 306 | 426 | 16 | 6 | 11 | 1.50 | 9.63 | 0.86 | 3.86 | 5.37 | 5.16 | 1.39 | ||||
| Tot: | AL (7 yrs) | AL | 42 | 48 | 4.54 | 170 | 111 | 9 | 1 | 23 | 59 | 3 | 714.0 | 764 | 409 | 360 | 68 | 306 | 426 | 16 | 6 | 11 | 1.50 | 9.63 | 0.86 | 3.86 | 5.37 | 5.16 | 1.39 | ||||
| Tot: | Minors (3 yrs) | Minors | 11 | 9 | 3.92 | 30 | 26 | 9 | 1 | 2 | 4 | 0 | 163.0 | 142 | 76 | 71 | 12 | 75 | 101 | 6 | 0 | 3 | 1.33 | 7.84 | 0.66 | 4.14 | 5.58 | 4.20 | 1.35 | ||||
| Tot: | AAA (3 yrs) | AAA | 11 | 9 | 3.92 | 30 | 26 | 9 | 1 | 2 | 4 | 0 | 163.0 | 142 | 76 | 71 | 12 | 75 | 101 | 6 | 0 | 3 | 1.33 | 7.84 | 0.66 | 4.14 | 5.58 | 4.20 | 1.35 | ||||
| Tot: | College (2 yrs) | College | 9 | 3 | 0.71 | 36 | 13 | 7 | 0 | 0 | 23 | 0 | 189.0 | 81 | 24 | 15 | 0 | 27 | 190 | 0 | 0 | 0 | 0.57 | 3.86 | 0.00 | 1.29 | 9.05 | 1.14 | 7.04 | ||||
| Avg: | MLB - 162 Inning avg | MLB | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | Minors - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | ||||
| Avg: | College - 162 Inning avg | College | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 162 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 | 🔒 |
| Strikeouts | Walks | Hittable | SO/BB | vs Power | Durability | Team Success |
| 66 | 55 | 56 | 54 | 56 | 63 | .507 |