Regular season and playoffs
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1961 | SF | 11 | 34 | 19 | 55.9 | 286 | 0 | 4 | 8 | 8.4 | 44.1 |
| 1962 | SF | 12 | 13 | 8 | 61.5 | 191 | 1 | 3 | 2 | 14.7 | 91.5 |
| 1964 | SF | 10 | 14 | 8 | 57.1 | 92 | 1 | 1 | 2 | 6.6 | 71.1 |
| 1966 | SF | 6 | 16 | 5 | 31.2 | 84 | 0 | 1 | 2 | 5.2 | 24.0 |
| 1967 | NO | 10 | 204 | 97 | 47.5 | 1341 | 6 | 11 | 18 | 6.6 | 56.4 |
| 1968 | NO | 12 | 315 | 167 | 53.0 | 2060 | 15 | 17 | 26 | 6.5 | 66.9 |
| 1969 | NO | 14 | 360 | 193 | 53.6 | 2532 | 20 | 17 | 22 | 7.0 | 74.9 |
| 1970 | NO | 13 | 237 | 135 | 57.0 | 1557 | 6 | 17 | 19 | 6.6 | 55.5 |
| 1971 | WAS | 15 | 333 | 177 | 53.2 | 2327 | 15 | 14 | 17 | 7.0 | 73.0 |
| 1972 | WAS | 15 | 285 | 155 | 54.4 | 2046 | 22 | 14 | 12 | 7.2 | 82.6 |
| 1973 | WAS | 11 | 251 | 135 | 53.8 | 1815 | 15 | 10 | 15 | 7.2 | 80.4 |
| 1974 | WAS | 12 | 252 | 144 | 57.1 | 1731 | 10 | 6 | 13 | 6.9 | 81.6 |
| 1975 | WAS | 12 | 346 | 178 | 51.4 | 2440 | 23 | 16 | 23 | 7.1 | 77.2 |
| 1976 | WAS | 11 | 255 | 134 | 52.5 | 1550 | 14 | 12 | 16 | 6.1 | 69.9 |
| 1977 | WAS | 8 | 201 | 99 | 49.3 | 1187 | 8 | 7 | 22 | 5.9 | 66.5 |
| 1978 | WAS | 5 | 46 | 23 | 50.0 | 316 | 4 | 3 | 4 | 6.9 | 74.2 |