Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 | SEA | 1 | 2 | 0 | 0.0 | 0 | 0 | 0 | 1 | 0.0 | 39.6 |
| 1981 | SEA | 7 | 112 | 64 | 57.1 | 843 | 7 | 5 | 11 | 7.5 | 83.3 |
| 1982 | SEA | 3 | 78 | 49 | 62.8 | 501 | 2 | 2 | 16 | 6.4 | 79.1 |
| 1983 | SEA | 9 | 243 | 147 | 60.5 | 2139 | 18 | 11 | 38 | 8.8 | 95.0 |
| 1984 | SEA | 16 | 480 | 276 | 57.5 | 3671 | 32 | 24 | 40 | 7.6 | 83.3 |
| 1985 | SEA | 16 | 532 | 285 | 53.6 | 3602 | 27 | 20 | 52 | 6.8 | 76.2 |
| 1986 | SEA | 15 | 375 | 225 | 60.0 | 2921 | 21 | 11 | 35 | 7.8 | 91.0 |
| 1987 | SEA | 12 | 294 | 178 | 60.5 | 2131 | 23 | 15 | 27 | 7.2 | 87.6 |
| 1988 | SEA | 9 | 228 | 134 | 58.8 | 1741 | 18 | 8 | 12 | 7.6 | 94.6 |
| 1989 | SEA | 15 | 499 | 286 | 57.3 | 3309 | 21 | 20 | 37 | 6.6 | 74.8 |
| 1990 | SEA | 16 | 448 | 265 | 59.2 | 3194 | 15 | 20 | 40 | 7.1 | 73.6 |
| 1991 | SEA | 10 | 285 | 187 | 65.6 | 2080 | 11 | 12 | 32 | 7.3 | 82.5 |
| 1992 | KC | 16 | 413 | 230 | 55.7 | 3115 | 15 | 12 | 48 | 7.5 | 79.9 |
| 1993 | KC | 12 | 189 | 105 | 55.6 | 1238 | 7 | 3 | 22 | 6.6 | 81.4 |
| 1994 | DET | 14 | 212 | 131 | 61.8 | 1629 | 14 | 3 | 14 | 7.7 | 101.7 |
| 1995 | ARI | 16 | 521 | 304 | 58.3 | 3554 | 16 | 21 | 53 | 6.8 | 72.6 |
| 1996 | CHI | 13 | 377 | 226 | 59.9 | 2278 | 14 | 12 | 14 | 6.0 | 76.3 |
| 1997 | TEN | 8 | 2 | 1 | 50.0 | 2 | 0 | 0 | 0 | 1.0 | 56.2 |
| 1998 | TEN | 5 | 21 | 12 | 57.1 | 199 | 0 | 0 | 2 | 9.5 | 89.2 |