Per Game Table | Season | Age | Tm | Lg | Pos | G | GS | MP | FG | FGA | FG% | 3P | 3PA | 3P% | 2P | 2PA | 2P% | eFG% | FT | FTA | FT% | ORB | DRB | TRB | AST | STL | BLK | TOV | PF | PTS |
| 1981-82 | 20 | DET | NBA | PG | 72 | 72 | 33.8 | 6.3 | 14.8 | .424 | 0.2 | 0.8 | .288 | 6.1 | 14.0 | .432 | .432 | 4.2 | 6.0 | .704 | 0.8 | 2.1 | 2.9 | 7.8 | 2.1 | 0.2 | 4.2 | 3.5 | 17.0 |
| 1982-83 | 21 | DET | NBA | PG | 81 | 81 | 38.2 | 9.0 | 19.0 | .472 | 0.4 | 1.5 | .288 | 8.5 | 17.4 | .488 | .483 | 4.5 | 6.4 | .710 | 1.3 | 2.8 | 4.0 | 7.8 | 2.5 | 0.4 | 4.0 | 3.9 | 22.9 |
| 1983-84 | 22 | DET | NBA | PG | 82 | 82 | 36.7 | 8.2 | 17.7 | .462 | 0.3 | 0.8 | .338 | 7.9 | 16.9 | .468 | .470 | 4.7 | 6.5 | .733 | 1.3 | 2.7 | 4.0 | 11.1 | 2.5 | 0.4 | 3.7 | 4.0 | 21.3 |
| 1984-85 | 23 | DET | NBA | PG | 81 | 81 | 38.1 | 8.0 | 17.4 | .458 | 0.4 | 1.4 | .257 | 7.6 | 16.0 | .476 | .468 | 4.9 | 6.1 | .809 | 1.4 | 3.0 | 4.5 | 13.9 | 2.3 | 0.3 | 3.7 | 3.6 | 21.2 |
| 1985-86 | 24 | DET | NBA | PG | 77 | 77 | 36.2 | 7.9 | 16.2 | .488 | 0.3 | 1.1 | .310 | 7.6 | 15.1 | .501 | .498 | 4.7 | 6.0 | .790 | 1.1 | 2.5 | 3.6 | 10.8 | 2.2 | 0.3 | 3.8 | 3.2 | 20.9 |
| 1986-87 | 25 | DET | NBA | PG | 81 | 81 | 37.2 | 7.7 | 16.7 | .463 | 0.2 | 1.2 | .194 | 7.5 | 15.5 | .484 | .470 | 4.9 | 6.4 | .768 | 1.0 | 2.9 | 3.9 | 10.0 | 1.9 | 0.2 | 4.2 | 3.1 | 20.6 |
| 1987-88 | 26 | DET | NBA | PG | 81 | 81 | 36.1 | 7.7 | 16.6 | .463 | 0.4 | 1.2 | .309 | 7.3 | 15.4 | .475 | .474 | 3.8 | 4.9 | .774 | 0.8 | 2.6 | 3.4 | 8.4 | 1.7 | 0.2 | 3.4 | 2.7 | 19.5 |
| 1988-89 | 27 | DET | NBA | PG | 80 | 76 | 36.6 | 7.1 | 15.3 | .464 | 0.4 | 1.5 | .273 | 6.7 | 13.8 | .485 | .477 | 3.6 | 4.4 | .818 | 0.6 | 2.8 | 3.4 | 8.3 | 1.7 | 0.3 | 3.7 | 2.6 | 18.2 |
| 1989-90 | 28 | DET | NBA | PG | 81 | 81 | 37.0 | 7.1 | 16.3 | .438 | 0.5 | 1.7 | .309 | 6.6 | 14.6 | .453 | .454 | 3.6 | 4.7 | .775 | 0.9 | 2.9 | 3.8 | 9.4 | 1.7 | 0.2 | 4.0 | 2.5 | 18.4 |
| 1990-91 | 29 | DET | NBA | PG | 48 | 46 | 34.5 | 6.0 | 13.9 | .435 | 0.4 | 1.4 | .292 | 5.6 | 12.5 | .450 | .449 | 3.7 | 4.8 | .782 | 0.7 | 2.6 | 3.3 | 9.3 | 1.6 | 0.2 | 3.9 | 2.5 | 16.2 |
| 1991-92 | 30 | DET | NBA | PG | 78 | 78 | 37.4 | 7.2 | 16.2 | .446 | 0.3 | 1.1 | .291 | 6.9 | 15.1 | .458 | .456 | 3.7 | 4.8 | .772 | 0.9 | 2.3 | 3.2 | 7.2 | 1.5 | 0.2 | 3.2 | 2.5 | 18.5 |
| 1992-93 | 31 | DET | NBA | PG | 79 | 79 | 37.0 | 6.7 | 15.9 | .418 | 0.8 | 2.5 | .308 | 5.9 | 13.4 | .439 | .442 | 3.5 | 4.8 | .737 | 0.9 | 2.0 | 2.9 | 8.5 | 1.6 | 0.2 | 3.6 | 2.8 | 17.6 |
| 1993-94 | 32 | DET | NBA | PG | 58 | 56 | 30.2 | 5.5 | 13.2 | .417 | 0.7 | 2.2 | .310 | 4.8 | 11.0 | .438 | .442 | 3.1 | 4.4 | .702 | 0.8 | 1.9 | 2.7 | 6.9 | 1.2 | 0.1 | 3.5 | 2.2 | 14.8 |
| Career | | | NBA | | 979 | 971 | 36.3 | 7.3 | 16.2 | .452 | 0.4 | 1.4 | .290 | 6.9 | 14.8 | .468 | .465 | 4.1 | 5.4 | .759 | 1.0 | 2.6 | 3.6 | 9.3 | 1.9 | 0.3 | 3.8 | 3.0 | 19.2 |