Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1957 | PIT | 3 | 4 | 2 | 50.0 | 25 | 0 | 0 | 0 | 6.2 | 69.8 |
| 1958 | PIT | 4 | 6 | 1 | 16.7 | 11 | 0 | 2 | 0 | 1.8 | 0.0 |
| 1959 | PIT | 12 | 7 | 3 | 42.9 | 60 | 1 | 0 | 0 | 8.6 | 113.1 |
| 1960 | CLE | 2 | 13 | 8 | 61.5 | 23 | 0 | 0 | 1 | 1.8 | 65.9 |
| 1961 | CLE | 7 | 15 | 7 | 46.7 | 85 | 1 | 3 | 3 | 5.7 | 47.2 |
| 1962 | DTX | 14 | 310 | 189 | 61.0 | 2759 | 29 | 17 | 41 | 8.9 | 98.3 |
| 1963 | KC | 14 | 352 | 190 | 54.0 | 2389 | 26 | 19 | 28 | 6.8 | 77.5 |
| 1964 | KC | 14 | 354 | 199 | 56.2 | 2879 | 30 | 18 | 36 | 8.1 | 89.9 |
| 1965 | KC | 14 | 305 | 163 | 53.4 | 2262 | 21 | 14 | 28 | 7.4 | 81.3 |
| 1966 | KC | 14 | 284 | 159 | 56.0 | 2527 | 26 | 10 | 23 | 8.9 | 101.7 |
| 1967 | KC | 14 | 357 | 206 | 57.7 | 2651 | 24 | 17 | 31 | 7.4 | 83.7 |
| 1968 | KC | 14 | 224 | 131 | 58.5 | 2109 | 17 | 9 | 18 | 9.4 | 98.6 |
| 1969 | KC | 9 | 166 | 98 | 59.0 | 1323 | 9 | 13 | 13 | 8.0 | 69.9 |
| 1970 | KC | 14 | 262 | 141 | 53.8 | 1876 | 13 | 14 | 34 | 7.2 | 71.0 |
| 1971 | KC | 14 | 301 | 167 | 55.5 | 2504 | 15 | 13 | 30 | 8.3 | 81.6 |
| 1972 | KC | 14 | 305 | 175 | 57.4 | 1835 | 13 | 12 | 28 | 6.0 | 72.8 |
| 1973 | KC | 8 | 101 | 66 | 65.3 | 725 | 2 | 5 | 14 | 7.2 | 72.4 |
| 1974 | KC | 14 | 235 | 138 | 58.7 | 1573 | 7 | 13 | 25 | 6.7 | 65.8 |
| 1975 | KC | 12 | 140 | 93 | 66.4 | 1095 | 5 | 4 | 23 | 7.8 | 90.0 |