| 1979 | GCL Royals | GCL | Rk | 19 | 0 | 0 | 0 | 0 | 0 | 46 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | -- | -- | .922 | -- | -- | -- | -- | 79 | 159 | 20 |
| 1980 | Fort Myers | FSL | A+ | 20 | 0 | 0 | 0 | 73 | 0 | 37 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .941 | -- | 1.000 | -- | -- | -- | -- | 175 | 301 | 21 |
| 1981 | Jacksonville | Sou | AA | 21 | 0 | 0 | 0 | 130 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .965 | -- | .900 | -- | -- | -- | -- | 286 | 368 | 25 |
| 1982 | Omaha | Amer | AAA | 22 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | 1.000 | -- | -- | -- | -- | -- | -- | 14 | 23 | 0 |
| | Phoenix | PCL | AAA | 22 | 0 | 0 | 0 | 102 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .970 | 1.000 | -- | -- | -- | -- | -- | 201 | 257 | 14 |
| | SF Giants | NL | MLB | 22 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | 1.000 | -- | -- | -- | -- | -- | -- | 0 | 1 | 0 |
| 1983 | Phoenix | PCL | AAA | 23 | 0 | 0 | 0 | 43 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .980 | -- | 1.000 | -- | -- | -- | -- | 79 | 123 | 4 |
| | SF Giants | NL | MLB | 23 | 0 | 0 | 0 | 74 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .965 | -- | 1.000 | -- | -- | -- | -- | 94 | 167 | 9 |
| 1984 | Phoenix | PCL | AAA | 24 | 0 | 0 | 0 | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .973 | -- | -- | -- | -- | -- | -- | 91 | 123 | 6 |
| | SF Giants | NL | MLB | 24 | 0 | 0 | 0 | 54 | 9 | 34 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .977 | 1.000 | .967 | -- | -- | -- | -- | 151 | 258 | 11 |
| 1985 | SF Giants | NL | MLB | 25 | 0 | 0 | 0 | 36 | 25 | 3 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .983 | .902 | .750 | -- | -- | -- | -- | 66 | 107 | 9 |
| 1986 | Phoenix | PCL | AAA | 26 | 0 | 0 | 0 | 66 | 6 | 8 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | .970 | .833 | .943 | -- | -- | -- | -- | 145 | 221 | 13 |
| | SF Giants | NL | MLB | 26 | 0 | 0 | 0 | 1 | 1 | 8 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | -- | 1.000 | 1.000 | -- | -- | -- | -- | 3 | 10 | 0 |
| 1987 | Albuquerque | PCL | AAA | 27 | 0 | 0 | 2 | 16 | 7 | 62 | 0 | 0 | 0 | 0 | 0 | -- | -- | 1.000 | .989 | .889 | .946 | -- | -- | -- | -- | 123 | 253 | 18 |
| | LA Dodgers | NL | MLB | 27 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | 1.000 | 1.000 | 1.000 | -- | -- | -- | -- | 3 | 3 | 0 |
| 1988 | KC Royals | AL | MLB | 28 | 0 | 0 | 0 | 46 | 4 | 15 | 0 | 0 | 0 | 0 | 3 | -- | -- | -- | .972 | 1.000 | .929 | -- | -- | -- | -- | 67 | 101 | 6 |
| 1989 | KC Royals | AL | MLB | 29 | 0 | 0 | 0 | 64 | 3 | 34 | 0 | 0 | 0 | 0 | 1 | -- | -- | -- | .995 | -- | .989 | -- | -- | -- | -- | 104 | 184 | 2 |
Minor League Totals | 0 | 0 | 2 | 478 | 15 | 159 | 0 | 0 | 0 | 0 | 0 | -- | -- | 1.000 | .967 | .889 | .947 | -- | -- | -- | -- | 1193 | 1828 | 121 |