Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1964 | KC | 14 | 9 | 4 | 44.4 | 50 | 1 | 2 | 1 | 5.6 | 59.7 |
| 1965 | KC | 14 | 89 | 36 | 40.4 | 632 | 1 | 6 | 9 | 7.1 | 41.0 |
| 1966 | KC | 14 | 90 | 39 | 43.3 | 578 | 4 | 4 | 7 | 6.4 | 61.3 |
| 1967 | HOU | 11 | 231 | 94 | 40.7 | 1114 | 9 | 14 | 15 | 4.8 | 43.8 |
| 1968 | HOU | 9 | 223 | 105 | 47.1 | 1559 | 7 | 16 | 14 | 7.0 | 51.0 |
| 1969 | HOU | 12 | 370 | 180 | 48.6 | 2455 | 10 | 21 | 22 | 6.6 | 55.6 |
| 1970 | LAR | 4 | 17 | 7 | 41.2 | 114 | 2 | 1 | 0 | 6.7 | 79.0 |
| 1971 | LAR | 9 | 141 | 60 | 42.6 | 1030 | 6 | 12 | 6 | 7.3 | 46.7 |
| 1972 | LAR | 14 | 48 | 19 | 39.6 | 255 | 1 | 7 | 4 | 5.3 | 24.6 |
| 1973 | KC | 9 | 64 | 31 | 48.4 | 389 | 2 | 1 | 9 | 6.1 | 71.7 |