Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1986 | BUF | 16 | 480 | 285 | 59.4 | 3593 | 22 | 17 | 43 | 7.5 | 83.3 |
| 1987 | BUF | 12 | 419 | 250 | 59.7 | 2798 | 19 | 11 | 27 | 6.7 | 83.8 |
| 1988 | BUF | 16 | 452 | 269 | 59.5 | 3380 | 15 | 17 | 30 | 7.5 | 78.2 |
| 1989 | BUF | 13 | 391 | 228 | 58.3 | 3130 | 25 | 18 | 30 | 8.0 | 86.2 |
| 1990 | BUF | 14 | 346 | 219 | 63.3 | 2829 | 24 | 9 | 20 | 8.2 | 101.2 |
| 1991 | BUF | 15 | 474 | 304 | 64.1 | 3844 | 33 | 17 | 31 | 8.1 | 97.6 |
| 1992 | BUF | 16 | 462 | 269 | 58.2 | 3457 | 23 | 19 | 20 | 7.5 | 81.2 |
| 1993 | BUF | 16 | 470 | 288 | 61.3 | 3382 | 18 | 18 | 25 | 7.2 | 79.9 |
| 1994 | BUF | 14 | 448 | 285 | 63.6 | 3114 | 22 | 17 | 34 | 7.0 | 84.6 |
| 1995 | BUF | 15 | 458 | 255 | 55.7 | 3130 | 22 | 13 | 26 | 6.8 | 81.1 |
| 1996 | BUF | 13 | 379 | 222 | 58.6 | 2810 | 14 | 19 | 37 | 7.4 | 73.2 |