Regular season and playoffs
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1974 | WAS | 9 | 11 | 9 | 81.8 | 145 | 1 | 0 | 2 | 13.2 | 149.1 |
| 1975 | WAS | 14 | 22 | 10 | 45.5 | 96 | 1 | 3 | 2 | 4.4 | 33.7 |
| 1976 | WAS | 14 | 163 | 79 | 48.5 | 1036 | 8 | 10 | 22 | 6.4 | 59.8 |
| 1977 | WAS | 14 | 182 | 84 | 46.2 | 1097 | 7 | 9 | 30 | 6.0 | 57.9 |
| 1978 | WAS | 16 | 390 | 187 | 47.9 | 2593 | 13 | 18 | 42 | 6.6 | 61.6 |
| 1979 | WAS | 16 | 395 | 233 | 59.0 | 2797 | 20 | 13 | 34 | 7.1 | 83.9 |
| 1980 | WAS | 16 | 454 | 262 | 57.7 | 2962 | 17 | 16 | 31 | 6.5 | 75.2 |
| 1981 | WAS | 16 | 496 | 293 | 59.1 | 3568 | 19 | 20 | 28 | 7.2 | 77.3 |
| 1982 | WAS | 13 | 337 | 219 | 65.0 | 2749 | 21 | 12 | 40 | 8.2 | 96.2 |
| 1983 | WAS | 19 | 543 | 324 | 59.7 | 4488 | 32 | 14 | 43 | 8.3 | 95.1 |
| 1984 | WAS | 17 | 519 | 305 | 58.8 | 3683 | 24 | 14 | 55 | 7.1 | 84.8 |
| 1985 | WAS | 11 | 301 | 167 | 55.5 | 1774 | 8 | 16 | 37 | 5.9 | 59.6 |