| 1985 | Helena | Pio | Rk | - | mil | 20 | 20 | 8 | 3 | 5.24 | 13 | 13 | 0 | 0 | 0 | 0 | 80.2 | 85 | 58 | 47 | 3 | 40 | 68 | 6 | | 1.55 | 9.48 | 0.33 | 4.46 | 7.59 | 0.59 | -- | -- |
| 1986 | Beloit | Midw | A | - | mil | 21 | 6 | 13 | 7 | 3.36 | 28 | 28 | 6 | 1 | 0 | 0 | 185.0 | 161 | 79 | 69 | 9 | 108 | 181 | 19 | | 1.45 | 7.83 | 0.44 | 5.25 | 8.81 | 0.60 | -- | -- |
| 1987 | Stockton | Calif | A+ | - | mil | 22 | 56 | 7 | 5 | 3.58 | 17 | 17 | 2 | 2 | 0 | 0 | 103.0 | 76 | 54 | 41 | 2 | 69 | 80 | 19 | | 1.41 | 6.64 | 0.17 | 6.03 | 6.99 | 0.86 | -- | -- |
| 1988 | Stockton | Calif | A+ | - | mil | 23 | 60 | 11 | 2 | 3.92 | 32 | 12 | 0 | 0 | 13 | 1 | 108.0 | 86 | 56 | 47 | 7 | 68 | 82 | 13 | | 1.43 | 7.17 | 0.58 | 5.67 | 6.83 | 0.83 | -- | -- |
| 1989 | Stockton | Calif | A+ | - | mil | 24 | - | 1 | 1 | 1.85 | 13 | 0 | 0 | 0 | 7 | 1 | 24.1 | 15 | 6 | 5 | 0 | 11 | 24 | 0 | | 1.07 | 5.55 | 0.00 | 4.07 | 8.88 | 0.46 | -- | -- |
| 1989 | El Paso | Tex | AA | - | mil | 24 | - | 1 | 1 | 4.46 | 22 | 3 | 0 | 0 | 8 | 0 | 42.1 | 45 | 22 | 21 | 4 | 24 | 27 | 4 | | 1.63 | 9.57 | 0.85 | 5.10 | 5.74 | 0.89 | -- | -- |
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| AA Totals (1 year) | 1 | 1 | 4.50 | 22 | 3 | 0 | 0 | 8 | 0 | 42 | 45 | 22 | 21 | 4 | 24 | 27 | 4 | 0 | 1.64 | 9.64 | 0.86 | 5.14 | 5.79 | 0.89 | -- | -- |
| A+ Totals (3 years) | 19 | 8 | 3.56 | 62 | 29 | 2 | 2 | 20 | 2 | 235 | 177 | 116 | 93 | 9 | 148 | 186 | 32 | 0 | 1.38 | 6.78 | 0.34 | 5.67 | 7.12 | 0.80 | -- | -- |
| A Totals (1 year) | 13 | 7 | 3.36 | 28 | 28 | 6 | 1 | 0 | 0 | 185 | 161 | 79 | 69 | 9 | 108 | 181 | 19 | 0 | 1.45 | 7.83 | 0.44 | 5.25 | 8.81 | 0.60 | -- | -- |
| Rookie Totals (1 year) | 8 | 3 | 5.22 | 13 | 13 | 0 | 0 | 0 | 0 | 81 | 85 | 58 | 47 | 3 | 40 | 68 | 6 | 0 | 1.54 | 9.44 | 0.33 | 4.44 | 7.56 | 0.59 | -- | -- |
| 1985 | Helena | Pio | Rk | P | 13 | | 26 | 6 | 19 | 1 | 1 | | .962 | -- | -- | |
| 1986 | Beloit | Midw | A | P | 28 | | 59 | 11 | 45 | 3 | 5 | | .949 | -- | -- | |
| 1987 | Stockton | Calif | A+ | P | 17 | | 20 | 5 | 12 | 3 | 2 | | .850 | -- | -- | |
| 1988 | Stockton | Calif | A+ | P | 32 | | 29 | 4 | 23 | 2 | 1 | | .931 | -- | -- | |
| 1989 | Stockton | Calif | A+ | P | 13 | | 3 | 0 | 3 | 0 | 0 | | 1.000 | -- | -- | |
| | El Paso | Tex | AA | P | 22 | | 13 | 1 | 12 | 0 | 1 | | 1.000 | -- | -- | |