Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | SEA | 14 | 439 | 208 | 47.4 | 2571 | 12 | 27 | 25 | 5.9 | 49.5 |
| 1977 | SEA | 10 | 251 | 104 | 41.4 | 1687 | 16 | 19 | 11 | 6.7 | 54.3 |
| 1978 | SEA | 16 | 443 | 248 | 56.0 | 3283 | 15 | 20 | 44 | 7.4 | 72.1 |
| 1979 | SEA | 16 | 505 | 285 | 56.4 | 3661 | 20 | 18 | 23 | 7.2 | 77.7 |
| 1980 | SEA | 16 | 488 | 276 | 56.6 | 3346 | 17 | 20 | 44 | 6.9 | 72.3 |
| 1981 | SEA | 13 | 397 | 236 | 59.4 | 2788 | 13 | 9 | 24 | 7.0 | 82.4 |
| 1982 | SEA | 9 | 245 | 126 | 51.4 | 1540 | 7 | 11 | 20 | 6.3 | 61.9 |
| 1983 | SEA | 16 | 205 | 103 | 50.2 | 1166 | 7 | 7 | 9 | 5.7 | 64.8 |
| 1984 | SEA | 16 | 17 | 7 | 41.2 | 80 | 0 | 2 | 1 | 4.7 | 16.4 |
| 1985 | GB | 13 | 123 | 56 | 45.5 | 794 | 4 | 6 | 11 | 6.5 | 57.4 |
| 1987 | TB | 1 | 36 | 20 | 55.6 | 199 | 0 | 2 | 1 | 5.5 | 48.3 |