Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | DAL | 2 | 8 | 5 | 62.5 | 47 | 0 | 0 | 0 | 5.9 | 78.6 |
| 1986 | DAL | 16 | 378 | 215 | 56.9 | 2727 | 8 | 17 | 47 | 7.2 | 67.9 |
| 1987 | DAL | 12 | 101 | 55 | 54.5 | 642 | 3 | 2 | 5 | 6.4 | 75.6 |
| 1988 | DAL | 16 | 435 | 245 | 56.3 | 3139 | 17 | 19 | 21 | 7.2 | 73.9 |
| 1989 | KC | 5 | 47 | 26 | 55.3 | 301 | 1 | 0 | 8 | 6.4 | 82.0 |
| 1990 | KC | 13 | 5 | 2 | 40.0 | 14 | 0 | 1 | 0 | 2.8 | 8.3 |