Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1969 | KC | 9 | 161 | 84 | 52.2 | 1123 | 4 | 6 | 11 | 7.0 | 67.4 |
| 1970 | KC | 4 | 22 | 11 | 50.0 | 122 | 0 | 1 | 4 | 5.5 | 47.9 |
| 1971 | KC | 3 | 28 | 12 | 42.9 | 130 | 0 | 0 | 4 | 4.6 | 57.1 |
| 1972 | KC | 5 | 78 | 41 | 52.6 | 480 | 7 | 8 | 6 | 6.2 | 61.9 |
| 1973 | KC | 8 | 145 | 75 | 51.7 | 916 | 6 | 7 | 16 | 6.3 | 65.2 |
| 1974 | KC | 8 | 141 | 66 | 46.8 | 732 | 4 | 10 | 10 | 5.2 | 42.6 |
| 1975 | KC | 7 | 176 | 88 | 50.0 | 1245 | 8 | 6 | 17 | 7.1 | 74.2 |
| 1976 | KC | 14 | 338 | 189 | 55.9 | 2682 | 12 | 13 | 31 | 7.9 | 77.6 |
| 1977 | KC | 13 | 282 | 143 | 50.7 | 1823 | 9 | 15 | 30 | 6.5 | 59.8 |
| 1978 | KC | 14 | 290 | 159 | 54.8 | 1573 | 5 | 13 | 18 | 5.4 | 57.4 |
| 1979 | KC | 5 | 90 | 44 | 48.9 | 469 | 1 | 4 | 5 | 5.2 | 49.7 |