Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1968 | DET | 4 | 48 | 23 | 47.9 | 338 | 2 | 7 | 6 | 7.0 | 45.7 |
| 1969 | DET | 10 | 160 | 80 | 50.0 | 853 | 4 | 10 | 30 | 5.3 | 48.3 |
| 1970 | DET | 12 | 136 | 83 | 61.0 | 1072 | 9 | 5 | 26 | 7.9 | 92.5 |
| 1971 | DET | 14 | 261 | 136 | 52.1 | 2237 | 16 | 13 | 29 | 8.6 | 80.9 |
| 1972 | DET | 14 | 268 | 134 | 50.0 | 2066 | 18 | 17 | 25 | 7.7 | 71.8 |
| 1973 | DET | 7 | 128 | 70 | 54.7 | 908 | 3 | 10 | 13 | 7.1 | 52.5 |
| 1974 | DET | 5 | 82 | 49 | 59.8 | 572 | 3 | 3 | 11 | 7.0 | 77.9 |
| 1975 | DET | 6 | 56 | 31 | 55.4 | 403 | 1 | 0 | 17 | 7.2 | 84.2 |
| 1976 | DET | 14 | 291 | 168 | 57.7 | 2191 | 17 | 8 | 55 | 7.5 | 89.6 |
| 1977 | DET | 11 | 240 | 135 | 56.2 | 1359 | 6 | 7 | 34 | 5.7 | 68.7 |
| 1978 | DET | 5 | 77 | 48 | 62.3 | 452 | 1 | 1 | 21 | 5.9 | 77.4 |
| 1979 | BAL | 16 | 457 | 270 | 59.1 | 2932 | 15 | 15 | 42 | 6.4 | 75.3 |
| 1980 | BAL | 16 | 47 | 24 | 51.1 | 275 | 2 | 3 | 2 | 5.9 | 56.6 |
| 1981 | BAL | 11 | 29 | 14 | 48.3 | 195 | 0 | 1 | 5 | 6.7 | 56.0 |
| 1984 | CHI | 1 | 20 | 11 | 55.0 | 199 | 1 | 3 | 0 | 10.0 | 66.5 |