| Year | Team | G | GS | W | L | SV | CG | SHO | IP | H | R | ER | HR | BB | K | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 10 | 10 | 6 | 1 | 0 | 0 | 0 | 56.1 | 33 | 18 | 15 | 3 | 9 | 62 | 2.40 | .750 | |
| 1999 | Rays | 24 | 24 | 8 | 9 | 0 | 0 | 0 | 142.1 | 136 | 81 | 72 | 17 | 57 | 97 | 4.55 | 1.36 |
| 1999 | 5 | 5 | 2 | 2 | 0 | 0 | 0 | 26.1 | 18 | 13 | 8 | 1 | 6 | 22 | 2.73 | .910 | |
| 2000 | Rays | 18 | 18 | 5 | 6 | 0 | 0 | 0 | 91 | 121 | 75 | 70 | 19 | 31 | 61 | 6.92 | 1.67 |
| 2000 | 5 | 5 | 0 | 1 | 0 | 0 | 0 | 19.1 | 24 | 16 | 14 | 3 | 7 | 18 | 6.52 | 1.60 | |
| 2001 | Rays | 28 | 26 | 5 | 12 | 0 | 0 | 0 | 143.1 | 161 | 111 | 105 | 30 | 48 | 123 | 6.59 | 1.46 |
| 2001 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 11 | 3 | 1 | 1 | 0 | 1 | 17 | .820 | .360 | |
| 2002 | Rays | 15 | 15 | 5 | 10 | 0 | 2 | 0 | 90 | 83 | 60 | 56 | 11 | 25 | 67 | 5.60 | 1.20 |
| 2003 | Red Sox | 4 | 1 | 1 | 1 | 0 | 0 | 0 | 10 | 13 | 9 | 7 | 4 | 1 | 7 | 6.30 | 1.40 |
| 2003 | 20 | 18 | 8 | 4 | 0 | 0 | 0 | 102 | 93 | 50 | 37 | 11 | 19 | 77 | 3.26 | 1.10 | |
| 2004 | 6 | 0 | 1 | 4 | 0 | 0 | 0 | 29.2 | 41 | 28 | 22 | 5 | 9 | 20 | 6.67 | 1.69 | |
| 2005 | 23 | 11 | 4 | 6 | 0 | 1 | 0 | 75.2 | 94 | 60 | 54 | 13 | 24 | 74 | 6.42 | 1.56 | |
| 2006 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 3 | 2 | 2 | 1 | 0 | 3 | 6.00 | 1.00 | |
| Career Total | 89 | 84 | 24 | 38 | 0 | 2 | 0 | 476.2 | 514 | 336 | 310 | 81 | 162 | 355 | 5.85 | 1.42 | |
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