| 1986 | Elmira | NYPL | A- | 19 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .900 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 5 | 4 | 1 |
| 1987 | Greensboro | SAL | A | 20 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .964 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 5 | 22 | 1 |
| 1988 | New Britain | East | AA | 21 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .963 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 10 | 16 | 1 |
| | Charlotte | Sou | AA | 21 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2 | 6 | 0 |
| | Baltimore | AL | MLB | 21 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | 1 |
| 1989 | Rochester | IL | AAA | 22 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .935 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 11 | 32 | 3 |
| | Baltimore | AL | MLB | 22 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1 | 0 | 0 |
| 1990 | Rochester | IL | AAA | 23 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 9 | 8 | 0 |
| | Baltimore | AL | MLB | 23 | 35 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1 | 4 | 0 |
| 1991 | Houston | NL | MLB | 24 | 56 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .909 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 6 | 4 | 1 |
| 1992 | Philadelphia | NL | MLB | 25 | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .921 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 14 | 21 | 3 |
| 1993 | Philadelphia | NL | MLB | 26 | 34 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 6 | 36 | 0 |
| 1994 | Scranton/WB | IL | AAA | 27 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 1 | 0 |
| | Philadelphia | NL | MLB | 27 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .929 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2 | 11 | 1 |
| 1995 | Philadelphia | NL | MLB | 28 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .909 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 2 | 8 | 1 |
| 1996 | Scranton/WB | IL | AAA | 29 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 4 | 0 |
| | Philadelphia | NL | MLB | 29 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .947 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 10 | 8 | 1 |
| 1997 | Philadelphia | NL | MLB | 30 | 35 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .980 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 20 | 28 | 1 |
| 1998 | Philadelphia | NL | MLB | 31 | 35 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .962 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 18 | 33 | 2 |
| 1999 | Philadelphia | NL | MLB | 32 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 11 | 19 | 0 |
| 2000 | Clearwater | FSL | A+ | 33 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1 | 1 | 0 |
| | Scranton/WB | IL | AAA | 33 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 1 | 0 |
| | Arizona | NL | MLB | 33 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 5 | 11 | 0 |
| | Philadelphia | NL | MLB | 33 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 6 | 8 | 0 |
| 2001 | Arizona | NL | MLB | 34 | 35 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .973 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 15 | 21 | 1 |
| 2002 | Arizona | NL | MLB | 35 | 36 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 9 | 16 | 0 |
| 2003 | Tucson | PCL | AAA | 36 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 0 | 0 |
| | Arizona | NL | MLB | 36 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .808 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 8 | 13 | 5 |
| 2004 | Boston | AL | MLB | 37 | 32 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 16 | 14 | 0 |
| 2005 | Pawtucket | IL | AAA | 38 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .667 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | 2 | 1 |
| | Boston | AL | MLB | 38 | 32 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .875 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 7 | 7 | 2 |
| 2006 | Boston | AL | MLB | 39 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .930 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 14 | 26 | 3 |
| 2007 | Boston | AL | MLB | 40 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 12 | 9 | 0 |
Minor League Totals | 132 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .952 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 43 | 97 | 7 |