Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1977 | DET | 13 | 100 | 42 | 42.0 | 445 | 1 | 5 | 9 | 4.4 | 38.1 |
| 1978 | DET | 16 | 351 | 199 | 56.7 | 2294 | 18 | 17 | 25 | 6.5 | 73.5 |
| 1980 | DET | 16 | 417 | 244 | 58.5 | 3223 | 13 | 11 | 44 | 7.7 | 82.4 |
| 1981 | DET | 6 | 96 | 56 | 58.3 | 784 | 3 | 5 | 12 | 8.2 | 73.4 |
| 1982 | DET | 8 | 197 | 100 | 50.8 | 1343 | 10 | 14 | 19 | 6.8 | 60.1 |
| 1983 | DET | 10 | 113 | 59 | 52.2 | 720 | 7 | 4 | 8 | 6.4 | 78.0 |
| 1984 | DET | 15 | 410 | 252 | 61.5 | 3076 | 17 | 15 | 41 | 7.5 | 83.1 |
| 1985 | CLE | 8 | 163 | 97 | 59.5 | 1274 | 8 | 6 | 17 | 7.8 | 85.3 |
| 1987 | CLE | 6 | 33 | 25 | 75.8 | 281 | 4 | 0 | 2 | 8.5 | 140.3 |
| 1988 | CLE | 2 | 52 | 31 | 59.6 | 324 | 0 | 1 | 6 | 6.2 | 69.7 |