Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1986 | CHI | 4 | 46 | 23 | 50.0 | 361 | 3 | 2 | 6 | 7.8 | 80.1 |
| 1987 | NE | 2 | 25 | 15 | 60.0 | 199 | 1 | 0 | 1 | 8.0 | 98.6 |
| 1988 | NE | 11 | 179 | 92 | 51.4 | 1150 | 8 | 10 | 11 | 6.4 | 63.3 |
| 1989 | NE | 5 | 91 | 36 | 39.6 | 493 | 2 | 4 | 6 | 5.4 | 46.6 |
| 1998 | BUF | 13 | 354 | 202 | 57.1 | 2711 | 20 | 11 | 12 | 7.7 | 87.4 |
| 1999 | BUF | 15 | 478 | 264 | 55.2 | 3171 | 19 | 16 | 26 | 6.6 | 75.1 |
| 2000 | BUF | 10 | 225 | 129 | 57.3 | 1656 | 8 | 2 | 9 | 7.4 | 88.7 |
| 2001 | SD | 16 | 521 | 294 | 56.4 | 3464 | 15 | 18 | 25 | 6.6 | 72.0 |
| 2002 | SD | 1 | 11 | 3 | 27.3 | 64 | 0 | 0 | 0 | 5.8 | 51.3 |
| 2003 | LAC | 7 | 167 | 91 | 54.5 | 1097 | 9 | 4 | 8 | 6.6 | 82.8 |
| 2004 | LAC | 2 | 38 | 20 | 52.6 | 276 | 1 | 0 | 1 | 7.3 | 85.0 |
| 2005 | NE | 5 | 10 | 5 | 50.0 | 29 | 0 | 0 | 1 | 2.9 | 56.2 |