| Year | Tm | G | W | L | Sv | IP | K | ERA | WHIP | R$ | T15 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1988 | BAL | 4 | 0 | 3 | 0 | 14 | 4 | 9.82 | 2.18 | -$5 | |
| 1989 | BAL | 5 | 0 | 1 | 0 | 9 | 6 | 6.23 | 1.50 | -$2 | |
| 1990 | BAL | 35 | 1 | 2 | 3 | 46 | 32 | 2.54 | 1.24 | $3 | |
| 1991 | HOU | 56 | 3 | 5 | 8 | 75 | 71 | 3.81 | 1.56 | $3 | |
| 1992 | PHI | 42 | 14 | 11 | 2 | 226 | 147 | 2.35 | 0.99 | $27 | T15 |
| 1993 | PHI | 34 | 16 | 7 | 0 | 235 | 186 | 4.02 | 1.24 | $18 | |
| 1994 | PHI | 13 | 2 | 8 | 0 | 82 | 58 | 4.48 | 1.40 | $1 | |
| 1995 | PHI | 17 | 7 | 5 | 0 | 116 | 114 | 3.57 | 1.05 | $13 | |
| 1996 | PHI | 26 | 9 | 10 | 0 | 183 | 182 | 3.19 | 1.09 | $21 | |
| 1997 | PHI | 35 | 17 | 11 | 0 | 254 | 319 | 2.97 | 1.05 | $33 | T15 |
| 1998 | PHI | 35 | 15 | 14 | 0 | 268 | 300 | 3.25 | 1.11 | $32 | T15 |
| 1999 | PHI | 24 | 15 | 6 | 0 | 180 | 152 | 3.54 | 1.13 | $21 | T15 |
| 2000 | PHI-ARI | 29 | 11 | 12 | 0 | 210 | 168 | 3.81 | 1.18 | $21 | |
| 2001 | ARI | 35 | 22 | 6 | 0 | 256 | 293 | 2.98 | 1.08 | $39 | T15 |
| 2002 | ARI | 36 | 23 | 7 | 0 | 259 | 316 | 3.23 | 0.97 | $37 | T15 |
| 2003 | ARI | 24 | 8 | 9 | 0 | 168 | 194 | 2.95 | 1.05 | $20 | |
| 2004 | BOS | 32 | 21 | 6 | 0 | 226 | 203 | 3.26 | 1.06 | $30 | T15 |
| 2005 | BOS | 32 | 8 | 8 | 9 | 93 | 87 | 5.69 | 1.53 | $1 | |
| 2006 | BOS | 31 | 15 | 7 | 0 | 204 | 183 | 3.97 | 1.22 | $19 | |
| 2007 | BOS | 24 | 9 | 8 | 0 | 151 | 101 | 3.87 | 1.25 | $10 |