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| 1981 | GCL Pirates | GCL | Rk | - | pit | 21 | - | 1 | 1 | 4.0 | 0.00 | 0.25 | 2.25 | -- | 0.00 | 13.50 | 0.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 32-28 | 5 | Woody Huyke |
| | Buffalo | East | AA | - | pit | 21 | - | 12 | 12 | 65.0 | 4.57 | 1.28 | 8.31 | 0.55 | 3.18 | 6.09 | 0.52 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 56-81 | 4 | Johnny Lipon |
| 1982 | Alexandria | Caro | A+ | - | pit | 22 | - | 7 | 7 | 28.0 | 3.86 | 1.50 | 9.96 | 0.64 | 3.54 | 6.43 | 0.55 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 80-54 | 1 | Johnny Lipon |
| | Buffalo | East | AA | - | pit | 22 | - | 3 | 2 | 6.2 | 5.40 | 1.65 | 8.10 | 2.70 | 6.75 | 9.45 | 0.71 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 55-84 | 4 | Tommy Sandt |
| 1983 | Hawaii | PCL | AAA | - | pit | 23 | - | 31 | 1 | 38.2 | 3.96 | 1.84 | 11.41 | 0.23 | 5.12 | 5.12 | 1.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 72-71 | 3 | Tom Trebelhorn |
| | Pittsburgh | NL | MLB | 41,59 | pit | 23 | - | 7 | 0 | 11.0 | 7.36 | 1.64 | 9.82 | 1.64 | 4.91 | 2.45 | 2.00 | 1.73 | 0 | 0 | 45 | .267 | 51 | -- | -- | -- | -- | 84-78 | 2 | Chuck Tanner |
| 1984 | Hawaii | PCL | AAA | - | pit | 24 | - | 21 | 0 | 44.2 | 3.43 | 1.61 | 8.87 | 0.20 | 5.64 | 5.64 | 1.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 87-53 | 1 | Tommy Sandt |
| | Pittsburgh | NL | MLB | 41 | pit | 24 | - | 9 | 0 | 18.2 | 3.86 | 1.50 | 9.16 | 0.96 | 4.34 | 5.30 | 0.82 | 1.21 | 0 | 0 | 72 | .264 | 81 | -- | -- | -- | -- | 75-87 | 6 | Chuck Tanner |
| 1985 | Hawaii | PCL | AAA | - | pit | 25 | - | 7 | 7 | 42.2 | 3.37 | 1.20 | 6.54 | 0.21 | 4.22 | 6.96 | 0.61 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 84-59 | 1 | Tommy Sandt |
| | Pittsburgh | NL | MLB | 41 | pit | 25 | - | 30 | 7 | 75.2 | 5.23 | 1.43 | 9.16 | 0.48 | 3.69 | 2.62 | 1.41 | 1.31 | 4 | 2 | 290 | .266 | 326 | -- | -- | -- | -- | 57-104 | 6 | Chuck Tanner |
| 1986 | Pittsburgh | NL | MLB | 41 | pit | 26 | - | 50 | 3 | 88.0 | 3.58 | 1.40 | 8.69 | 0.92 | 3.89 | 7.16 | 0.54 | 2.00 | 1 | 2 | 330 | .258 | 377 | -- | -- | -- | -- | 64-98 | 6 | Jim Leyland |
| 1987 | Chi White Sox | AL | MLB | 40,45 | chw | 27 | 77 | 56 | 0 | 94.0 | 4.79 | 1.67 | 9.10 | 0.96 | 5.94 | 4.21 | 1.41 | 2.30 | 0 | 6 | 350 | .271 | 422 | -- | -- | -- | -- | 77-85 | 5 | Jim Fregosi |
| 1988 | Portland | PCL | AAA | - | min | 28 | 64 | 22 | 0 | 29.1 | 3.99 | 1.50 | 9.82 | 0.92 | 3.68 | 6.44 | 0.57 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 76-66 | 2 | Jim Mahoney, Jim Shellenback |
| | Minnesota | AL | MLB | 48 | min | 28 | - | 9 | 0 | 21.0 | 6.00 | 2.05 | 14.14 | 1.71 | 4.29 | 3.86 | 1.11 | 1.10 | 0 | 0 | 93 | .355 | 105 | 3.52 | 41.1 | 58.9 | 5.4 | 91-71 | 2 | Tom Kelly |
| Minor League Totals (6 years) | 104 | 30 | 260 | 0 | 1.44 | 8.79 | 0.48 | 4.19 | 6.27 | 0.67 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | .522 | -- | |
| AAA Totals (4 years) | 81 | 8 | 156 | 0 | 1.53 | 9.00 | 0.35 | 4.73 | 6.00 | 0.79 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | .562 | -- | |
| AA Totals (2 years) | 15 | 14 | 72 | 0 | 1.31 | 8.25 | 0.75 | 3.50 | 6.38 | 0.55 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | .402 | -- | |
| A+ Totals (1 year) | 7 | 7 | 28 | 0 | 1.50 | 9.96 | 0.64 | 3.54 | 6.43 | 0.55 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | .597 | -- | |
| Rookie Totals (1 year) | 1 | 1 | 4 | 0 | 0.25 | 2.25 | 0.00 | 0.00 | 13.50 | 0.00 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | .533 | -- | |