Regular season and playoffs
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1963 | PIT | 2 | 2 | 0 | 0.0 | 0 | 0 | 0 | 1 | 0.0 | 39.6 |
| 1964 | PIT | 5 | 42 | 16 | 38.1 | 276 | 2 | 3 | 5 | 6.6 | 47.3 |
| 1965 | PIT | 12 | 270 | 121 | 44.8 | 1917 | 8 | 17 | 42 | 7.1 | 52.7 |
| 1966 | PIT | 5 | 112 | 63 | 56.2 | 1122 | 7 | 1 | 15 | 10.0 | 107.8 |
| 1967 | PIT | 8 | 165 | 74 | 44.8 | 1125 | 10 | 9 | 22 | 6.8 | 65.3 |
| 1968 | CLE | 16 | 344 | 176 | 51.2 | 2701 | 20 | 13 | 16 | 7.9 | 81.1 |
| 1969 | CLE | 16 | 412 | 225 | 54.6 | 3143 | 25 | 21 | 20 | 7.6 | 78.4 |
| 1970 | CLE | 12 | 313 | 159 | 50.8 | 2156 | 16 | 16 | 8 | 6.9 | 68.9 |
| 1971 | CLE | 15 | 346 | 183 | 52.9 | 2423 | 13 | 26 | 26 | 7.0 | 56.6 |
| 1972 | CLE | 4 | 31 | 14 | 45.2 | 141 | 0 | 3 | 3 | 4.5 | 19.1 |