| 1977 | GCL Astros | GCL | Rk | - | hou | 18 | - | 3 | 4 | 3.00 | 8 | 8 | 0 | 0 | | 0 | 48.0 | 42 | 23 | 16 | 1 | 20 | 27 | 1 | 0 | 1.29 | 7.88 | 0.19 | 3.75 | 5.06 | 0.74 | -- | -- |
| 1977 | Cocoa | FSL | A+ | - | hou | 18 | - | 0 | 2 | 9.75 | 3 | 2 | 1 | 0 | | 0 | 12.0 | 15 | 15 | 13 | 1 | 14 | 7 | 1 | 2 | 2.42 | 11.25 | 0.75 | 10.50 | 5.25 | 2.00 | -- | -- |
| 1978 | GCL Astros | GCL | Rk | - | hou | 19 | 37 | 2 | 3 | 3.77 | 8 | 8 | 2 | 1 | | 0 | 43.0 | 44 | 24 | 18 | 0 | 17 | 23 | 0 | | 1.42 | 9.21 | 0.00 | 3.56 | 4.81 | 0.74 | -- | -- |
| 1978 | Daytona | FSL | A+ | - | hou | 19 | - | 1 | 9 | 8.84 | 12 | 12 | 1 | 0 | | 0 | 57.0 | 85 | 64 | 56 | 3 | 34 | 31 | 2 | | 2.09 | 13.42 | 0.47 | 5.37 | 4.89 | 1.10 | -- | -- |
| 1979 | Daytona | FSL | A+ | - | hou | 20 | 30 | 5 | 13 | 3.74 | 22 | 19 | 5 | 0 | | 0 | 130.0 | 127 | 67 | 54 | 3 | 62 | 111 | 6 | | 1.45 | 8.79 | 0.21 | 4.29 | 7.68 | 0.56 | -- | -- |
| 1979 | Columbus | Sou | AA | - | hou | 20 | - | 1 | 2 | 4.06 | 5 | 5 | 1 | 0 | | 0 | 31.0 | 30 | 17 | 14 | 3 | 14 | 13 | 1 | | 1.42 | 8.71 | 0.87 | 4.06 | 3.77 | 1.08 | -- | -- |
| 1980 | Columbus | Sou | AA | - | hou | 21 | 13 | 8 | 11 | 3.49 | 28 | 28 | 9 | 2 | | 0 | 201.0 | 186 | 99 | 78 | 17 | 76 | 95 | 1 | | 1.30 | 8.33 | 0.76 | 3.40 | 4.25 | 0.80 | -- | -- |
| 1981 | Columbus | Sou | AA | - | hou | 22 | 57 | 5 | 10 | 5.54 | 22 | 21 | 3 | 0 | 1 | 0 | 112.0 | 127 | 86 | 69 | 13 | 65 | 49 | 6 | | 1.71 | 10.21 | 1.04 | 5.22 | 3.94 | 1.33 | -- | -- |
| 1981 | Tucson | PCL | AAA | 26 | hou | 22 | - | 1 | 4 | 7.36 | 5 | 5 | 0 | 0 | 0 | 0 | 22.0 | 38 | 23 | 18 | 2 | 12 | 11 | 2 | | 2.27 | 15.55 | 0.82 | 4.91 | 4.50 | 1.09 | -- | -- |
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| AAA Totals (1 year) | 1 | 4 | 7.36 | 5 | 5 | 0 | 0 | 0 | 0 | 22 | 38 | 23 | 18 | 2 | 12 | 11 | 2 | 0 | 2.27 | 15.55 | 0.82 | 4.91 | 4.50 | 1.09 | -- | -- |
| AA Totals (3 years) | 14 | 23 | 4.21 | 55 | 54 | 13 | 2 | 1 | 0 | 344 | 343 | 202 | 161 | 33 | 155 | 157 | 8 | 0 | 1.45 | 8.97 | 0.86 | 4.06 | 4.11 | 0.99 | -- | -- |
| A+ Totals (3 years) | 6 | 24 | 5.56 | 37 | 33 | 7 | 0 | 0 | 0 | 199 | 227 | 146 | 123 | 7 | 110 | 149 | 9 | 2 | 1.69 | 10.27 | 0.32 | 4.97 | 6.74 | 0.74 | -- | -- |
| Rookie Totals (2 years) | 5 | 7 | 3.36 | 16 | 16 | 2 | 1 | 0 | 0 | 91 | 86 | 47 | 34 | 1 | 37 | 50 | 1 | 0 | 1.35 | 8.51 | 0.10 | 3.66 | 4.95 | 0.74 | -- | -- |
| 1977 | GCL Astros | GCL | Rk | - | hou | 18 | | - | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 0 | 0 | | .000 | .000 | .000 | 0 | - | - | 0 | 0 | | -- | -- | .000 |
| 1977 | Cocoa | FSL | A+ | - | hou | 18 | | - | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 0 | 0 | | .000 | .000 | .000 | 0 | - | - | 0 | 0 | | -- | -- | .000 |
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| A+ Totals (1 year) | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | - | -- | -- | 0 | 0 | 0 | - | - | .000 |
| Rookie Totals (1 year) | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | .000 | .000 | - | -- | -- | 0 | 0 | 0 | - | - | .000 |