Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1970 | NO | 1 | 2 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0.0 | 39.6 |
| 1971 | DEN | 9 | 178 | 84 | 47.2 | 1120 | 5 | 13 | 13 | 6.3 | 46.6 |
| 1972 | DEN | 9 | 137 | 65 | 47.4 | 1050 | 3 | 9 | 26 | 7.7 | 53.5 |
| 1973 | DEN | 5 | 27 | 10 | 37.0 | 194 | 2 | 2 | 0 | 7.2 | 56.7 |
| 1974 | DEN | 7 | 74 | 41 | 55.4 | 580 | 5 | 7 | 9 | 7.8 | 64.0 |
| 1975 | DEN | 11 | 233 | 128 | 54.9 | 1562 | 9 | 14 | 23 | 6.7 | 63.6 |
| 1976 | DEN | 12 | 270 | 128 | 47.4 | 1931 | 11 | 13 | 39 | 7.2 | 64.9 |