Regular season
| Year | Team | Games | Att | Cmp | Cmp% | Pass Yds | Pass TD | INT | Sacks | Y/A | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | WAS | 1 | 1 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0.0 | 39.6 |
| 1998 | WAS | 15 | 509 | 278 | 54.6 | 3441 | 23 | 11 | 49 | 6.8 | 81.8 |
| 2000 | STL | 8 | 240 | 145 | 60.4 | 2063 | 16 | 5 | 24 | 8.6 | 101.8 |
| 2001 | KC | 16 | 523 | 296 | 56.6 | 3783 | 17 | 24 | 39 | 7.2 | 71.1 |
| 2002 | KC | 16 | 470 | 287 | 61.1 | 3690 | 26 | 13 | 26 | 7.9 | 92.6 |
| 2003 | KC | 16 | 523 | 330 | 63.1 | 4039 | 24 | 12 | 20 | 7.7 | 92.6 |
| 2004 | KC | 16 | 556 | 369 | 66.4 | 4589 | 27 | 17 | 32 | 8.3 | 95.2 |
| 2005 | KC | 16 | 507 | 317 | 62.5 | 4014 | 17 | 10 | 32 | 7.9 | 90.1 |
| 2006 | KC | 8 | 198 | 121 | 61.1 | 1342 | 7 | 9 | 24 | 6.8 | 74.1 |
| 2007 | MIA | 5 | 141 | 85 | 60.3 | 987 | 5 | 7 | 7 | 7.0 | 72.6 |
| 2008 | LA | 3 | 72 | 38 | 52.8 | 525 | 0 | 6 | 6 | 7.3 | 41.7 |