| Year | Tm | G | W | L | Sv | IP | K | ERA | WHIP | R$ | T15 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1986 | TEX | 1 | 1 | 0 | 0 | 5 | 4 | 3.60 | 1.20 | -$1 | |
| 1987 | |||||||||||
| 1988 | TEX | 4 | 1 | 1 | 0 | 23 | 12 | 4.24 | 1.76 | -$2 | |
| 1989 | TEX | 28 | 12 | 9 | 0 | 191 | 104 | 3.35 | 1.24 | $11 | |
| 1990 | TEX | 26 | 12 | 10 | 0 | 180 | 88 | 3.60 | 1.31 | $9 | |
| 1991 | TEX | 33 | 9 | 12 | 0 | 210 | 96 | 4.40 | 1.53 | -$2 | |
| 1992 | TEX | 35 | 21 | 11 | 0 | 265 | 173 | 3.32 | 1.27 | $19 | |
| 1993 | TEX | 34 | 15 | 12 | 0 | 233 | 142 | 3.59 | 1.30 | $16 | |
| 1994 | TEX | 26 | 7 | 9 | 0 | 170 | 123 | 4.82 | 1.58 | $4 | |
| 1995 | BAL | 26 | 10 | 9 | 0 | 172 | 117 | 3.60 | 1.18 | $16 | |
| 1996 | FLA | 32 | 17 | 11 | 0 | 233 | 159 | 1.89 | 0.94 | $37 | T15 |
| 1997 | FLA | 33 | 16 | 8 | 0 | 237 | 205 | 2.69 | 1.18 | $25 | T15 |
| 1998 | SDP | 36 | 18 | 7 | 0 | 257 | 257 | 2.38 | 1.07 | $37 | T15 |
| 1999 | LAD | 35 | 18 | 9 | 0 | 252 | 221 | 3.00 | 1.07 | $35 | T15 |
| 2000 | LAD | 33 | 13 | 6 | 0 | 230 | 216 | 2.58 | 0.99 | $36 | T15 |
| 2001 | LAD | 20 | 10 | 4 | 0 | 115 | 104 | 2.65 | 1.14 | $14 | |
| 2002 | LAD | 17 | 3 | 4 | 0 | 63 | 58 | 4.81 | 1.43 | -$1 | |
| 2003 | LAD | 32 | 14 | 9 | 0 | 211 | 185 | 2.39 | 1.14 | $26 | T15 |
| 2004 | NYY | 22 | 10 | 6 | 0 | 132 | 83 | 4.09 | 1.27 | $8 | |
| 2005 | NYY | 13 | 4 | 7 | 0 | 73 | 50 | 6.50 | 1.72 | -$7 |