| 1970 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 218 | 83 | 38.1 | 1,410 | 6.5 | 6 | 2.8 | 24 | 11.0 | 87t | 25/242 | 30.4 |
| 1971 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 373 | 203 | 54.4 | 2,259 | 6.1 | 13 | 3.5 | 22 | 5.9 | 49 | 33/287 | 59.7 |
| 1972 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 308 | 147 | 47.7 | 1,887 | 6.1 | 12 | 3.9 | 12 | 3.9 | 78t | 29/237 | 64.1 |
| 1973 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 180 | 89 | 49.4 | 1,183 | 6.6 | 10 | 5.6 | 15 | 8.3 | 67 | 24/186 | 54.5 |
| 1974 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 148 | 67 | 45.3 | 785 | 5.3 | 7 | 4.7 | 8 | 5.4 | 56 | 10/104 | 55.2 |
| 1975 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 286 | 165 | 57.7 | 2,055 | 7.2 | 18 | 6.3 | 9 | 3.1 | 59 | 31/290 | 88.0 |
| 1976 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 192 | 92 | 47.9 | 1,177 | 6.1 | 10 | 5.2 | 9 | 4.7 | 50 | 16/164 | 65.4 |
| 1977 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 314 | 162 | 51.6 | 2,523 | 8.0 | 17 | 5.4 | 19 | 6.1 | 65t | 26/235 | 71.4 |
| 1978 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 368 | 207 | 56.2 | 2,915 | 7.9 | 28 | 7.6 | 20 | 5.4 | 70 | 21/222 | 84.7 |
| 1979 | Pittsburgh (NFL)PIT (NFL) | -- | -- | 472 | 259 | 54.9 | 3,724 | 7.9 | 26 | 5.5 | 25 | 5.3 | 65t | 24/196 | 77.0 |
| 1980 | Pittsburgh (NFL)PIT (NFL) | 15 | -- | 424 | 218 | 51.4 | 3,339 | 7.9 | 24 | 5.7 | 22 | 5.2 | 68t | 33/245 | 75.0 |
| 1981 | Pittsburgh (NFL)PIT (NFL) | 14 | 14 | 370 | 201 | 54.3 | 2,887 | 7.8 | 22 | 5.9 | 14 | 3.8 | 90t | 17/155 | 83.9 |
| 1982 | Pittsburgh (NFL)PIT (NFL) | 9 | 9 | 240 | 127 | 52.9 | 1,768 | 7.4 | 17 | 7.1 | 11 | 4.6 | 74t | 18/131 | 81.4 |
| 1983 | Pittsburgh (NFL)PIT (NFL) | 1 | 1 | 8 | 5 | 62.5 | 77 | 9.6 | 2 | 25.0 | 0 | 0.0 | 24 | 0/0 | 133.9 |