| 1992 | San Jose | Calif | A+ | 21 | 0 | 53 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .973 | -- | -- | -- | -- | -- | -- | -- | -- | 321 | 38 | 10 |
| 1993 | San Jose | Calif | A+ | 22 | 0 | 113 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .989 | -- | -- | -- | -- | -- | -- | -- | -- | 737 | 99 | 9 |
| 1994 | Shreveport | Tex | AA | 23 | 0 | 65 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .992 | 1.000 | -- | -- | -- | -- | -- | -- | -- | 391 | 53 | 3 |
| 1995 | Shreveport | Tex | AA | 24 | 0 | 35 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .984 | 1.000 | -- | -- | -- | -- | -- | -- | -- | 193 | 21 | 3 |
| | Phoenix | PCL | AAA | 24 | 0 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .985 | -- | -- | -- | -- | -- | -- | -- | -- | 115 | 17 | 2 |
| 1996 | Shreveport | Tex | AA | 25 | 0 | 106 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .988 | 1.000 | -- | -- | -- | -- | -- | -- | -- | 548 | 56 | 7 |
| | Phoenix | PCL | AAA | 25 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .982 | -- | -- | -- | -- | -- | -- | -- | -- | 97 | 10 | 2 |
| | SF Giants | NL | MLB | 25 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 29 | 2 | 0 |
| 1997 | Phoenix | PCL | AAA | 26 | 0 | 99 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .994 | -- | -- | -- | -- | -- | -- | -- | -- | 629 | 47 | 4 |
| | SF Giants | NL | MLB | 26 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 16 | 0 | 0 |
| 1998 | Fresno | PCL | AAA | 27 | 0 | 83 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .995 | -- | -- | -- | -- | -- | -- | -- | -- | 605 | 50 | 3 |
| | SF Giants | NL | MLB | 27 | 0 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .974 | -- | -- | -- | -- | -- | -- | -- | -- | 34 | 4 | 1 |
| 1999 | Fresno | PCL | AAA | 28 | 0 | 66 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .993 | .994 | -- | -- | -- | -- | -- | -- | -- | 619 | 73 | 5 |
| | SF Giants | NL | MLB | 28 | 0 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 156 | 11 | 0 |
| 2000 | SF Giants | NL | MLB | 29 | 0 | 80 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .985 | -- | -- | -- | -- | -- | -- | -- | -- | 428 | 39 | 7 |
| 2001 | Texas | AL | MLB | 30 | 0 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | -- | .990 | -- | -- | -- | -- | -- | -- | -- | -- | 84 | 16 | 1 |
| | Boston | AL | MLB | 30 | 0 | 52 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | -- | .995 | -- | -- | -- | -- | -- | -- | -- | -- | 329 | 33 | 2 |
| 2002 | Boston | AL | MLB | 31 | 0 | 50 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 285 | 30 | 0 |
| 2003 | Boston | AL | MLB | 32 | 0 | 55 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | -- | .988 | .857 | -- | -- | -- | -- | -- | -- | -- | 324 | 22 | 5 |
| 2004 | Boston | AL | MLB | 33 | 0 | 53 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | -- | .993 | -- | -- | -- | -- | -- | -- | -- | -- | 285 | 18 | 2 |
| 2005 | Boston | AL | MLB | 34 | 0 | 43 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | -- | .988 | -- | -- | -- | -- | -- | -- | -- | -- | 224 | 17 | 3 |
| 2006 | Boston | AL | MLB | 35 | 0 | 57 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | -- | .994 | -- | -- | -- | -- | -- | -- | -- | -- | 298 | 18 | 2 |
| | San Diego | NL | MLB | 35 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 1.000 | -- | -- | -- | -- | -- | -- | -- | -- | 37 | 2 | 0 |
| 2007 | Boston | AL | MLB | 36 | 0 | 46 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | -- | .995 | -- | -- | -- | -- | -- | -- | -- | -- | 194 | 19 | 1 |
Minor League Totals | 0 | 657 | 37 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -- | .990 | .996 | -- | -- | -- | -- | -- | -- | -- | 4255 | 464 | 48 |