| 1978 | Medicine Hat | Pio | Rk | 18 | 0 | 41 | 6 | 0 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .957 | 1.000 | -- | .886 | -- | -- | -- | -- | -- | 261 | 68 | 19 |
| 1979 | Dunedin | FSL | A+ | 19 | 0 | 45 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 1 | 0 | -- | .979 | -- | -- | 1.000 | -- | -- | -- | -- | 1.000 | 206 | 42 | 5 |
| | Syracuse | IL | AAA | 19 | 0 | 18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .987 | -- | -- | -- | -- | -- | -- | -- | -- | 67 | 12 | 1 |
| 1980 | Knoxville | Sou | AA | 20 | 0 | 94 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | -- | .973 | .970 | -- | -- | -- | -- | -- | -- | 1.000 | 569 | 82 | 18 |
| 1981 | Syracuse | IL | AAA | 21 | 0 | 41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .973 | -- | -- | -- | -- | -- | -- | -- | -- | 188 | 30 | 6 |
| 1982 | Syracuse | IL | AAA | 22 | 0 | 117 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .974 | .978 | -- | -- | -- | -- | -- | -- | -- | 674 | 89 | 20 |
| | Toronto | AL | MLB | 22 | 0 | 12 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .981 | -- | -- | 1.000 | -- | -- | -- | -- | -- | 51 | 4 | 1 |
| 1983 | Syracuse | IL | AAA | 23 | 0 | 70 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .989 | .987 | -- | -- | -- | -- | -- | -- | -- | 541 | 68 | 7 |
| | Toronto | AL | MLB | 23 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 7 | 0 | 0 |
| 1984 | Maine | IL | AAA | 24 | 0 | 17 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | -- | .982 | .846 | -- | -- | -- | -- | -- | -- | .846 | 122 | 11 | 6 |
| | Toronto | AL | MLB | 24 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 1 | 1 | 0 |
| 1985 | Maine | IL | AAA | 25 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .929 | -- | -- | -- | -- | -- | -- | -- | -- | 12 | 1 | 1 |
| | Oklahoma City | Amer | AAA | 25 | 0 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .976 | -- | -- | -- | -- | -- | -- | -- | -- | 108 | 14 | 3 |
| | Texas | AL | MLB | 25 | 0 | 41 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .990 | -- | -- | -- | -- | -- | -- | -- | -- | 179 | 16 | 2 |
| 1986 | Texas | AL | MLB | 26 | 0 | 41 | 0 | 2 | 15 | 0 | 0 | 0 | 0 | 0 | 2 | -- | .988 | -- | -- | .846 | -- | -- | -- | -- | -- | 163 | 14 | 4 |
| 1987 | Texas | AL | MLB | 27 | 0 | 63 | 5 | 4 | 17 | 0 | 0 | 0 | 0 | 3 | 2 | -- | .995 | 1.000 | 1.000 | .882 | -- | -- | -- | -- | .667 | 370 | 34 | 5 |
| 1988 | Texas | AL | MLB | 28 | 0 | 85 | 2 | 2 | 9 | 0 | 0 | 0 | 0 | 0 | 23 | -- | .981 | 1.000 | 1.000 | .857 | -- | -- | -- | -- | -- | 421 | 54 | 10 |
| 1989 | Tulsa | Tex | AA | 29 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 6 | 1 | 0 |
| | Texas | AL | MLB | 29 | 0 | 49 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | -- | .989 | -- | -- | -- | -- | -- | -- | -- | -- | 258 | 15 | 3 |
| 1990 | Texas | AL | MLB | 30 | 0 | 118 | 0 | 3 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .991 | -- | 1.000 | 1.000 | -- | -- | -- | -- | -- | 602 | 46 | 6 |
| 1991 | Oklahoma City | Amer | AAA | 31 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 13 | 1 | 0 |
| | Texas | AL | MLB | 31 | 0 | 66 | 0 | 0 | 7 | 0 | 0 | 0 | 0 | 0 | 5 | -- | .972 | -- | -- | .750 | -- | -- | -- | -- | -- | 294 | 25 | 11 |
| 1992 | Texas | AL | MLB | 32 | 0 | 54 | 0 | 2 | 4 | 0 | 0 | 0 | 0 | 0 | 14 | -- | .990 | -- | .500 | 1.000 | -- | -- | -- | -- | -- | 264 | 24 | 4 |
| 1993 | Oklahoma City | Amer | AAA | 33 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .857 | -- | -- | -- | -- | -- | -- | -- | -- | 5 | 1 | 1 |
| | Texas | AL | MLB | 33 | 0 | 39 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | -- | .990 | -- | 1.000 | -- | -- | -- | -- | -- | -- | 179 | 11 | 2 |
| 1994 | Orlando | Sou | AA | 34 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 15 | 0 | 0 |
| | Iowa | Amer | AAA | 34 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 1 | 0 | 0 |
Minor League Totals | 0 | 479 | 40 | 0 | 31 | 0 | 0 | 0 | 0 | 8 | 0 | -- | .976 | .977 | -- | .904 | -- | -- | -- | -- | .867 | 2788 | 420 | 87 |