Regular season and playoffs
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | MIN | 1 | 10 | 1 | 10.0 | 5 | 0 | 0 | 2 | 0.5 | 39.6 |
| 1986 | MIN | 1 | 1 | 1 | 100.0 | 3 | 0 | 0 | 0 | 3.0 | 79.2 |
| 1987 | PIT | 3 | 74 | 34 | 45.9 | 438 | 5 | 2 | 6 | 5.9 | 76.3 |
| 1988 | PIT | 2 | 35 | 10 | 28.6 | 110 | 1 | 2 | 1 | 3.1 | 25.9 |
| 1989 | SF | 1 | 5 | 4 | 80.0 | 62 | 1 | 0 | 0 | 12.4 | 157.9 |
| 1991 | SF | 9 | 237 | 141 | 59.5 | 1617 | 11 | 4 | 11 | 6.8 | 88.5 |
| 1992 | SF | 16 | 56 | 36 | 64.3 | 463 | 2 | 2 | 2 | 8.3 | 87.1 |
| 1993 | SF | 10 | 63 | 41 | 65.1 | 431 | 0 | 1 | 4 | 6.8 | 78.2 |
| 1994 | KC | 7 | 117 | 66 | 56.4 | 796 | 4 | 4 | 0 | 6.8 | 74.6 |
| 1995 | KC | 17 | 545 | 304 | 55.8 | 3243 | 22 | 13 | 21 | 6.0 | 76.9 |
| 1996 | KC | 14 | 438 | 235 | 53.7 | 2572 | 12 | 13 | 22 | 5.9 | 68.0 |
| 1997 | GB | 2 | 10 | 5 | 50.0 | 29 | 0 | 0 | 1 | 2.9 | 56.2 |
| 1998 | LAR | 6 | 136 | 69 | 50.7 | 807 | 5 | 4 | 6 | 5.9 | 69.1 |
| 1999 | CAR | 2 | 1 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0.0 | 39.6 |