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 |
| 2008-09 | 20 | OKC | NBA | PG | 82 | 65 | 32.5 | 5.3 | 13.4 | .398 | 0.4 | 1.6 | .271 | 4.9 | 11.8 | .415 | .414 | 4.3 | 5.2 | .815 | 2.2 | 2.7 | 4.9 | 5.3 | 1.3 | 0.2 | 3.3 | 2.3 | 15.3 |
| 2009-10 | 21 | OKC | NBA | PG | 82 | 82 | 34.3 | 5.9 | 14.1 | .418 | 0.3 | 1.3 | .221 | 5.6 | 12.9 | .438 | .428 | 4.0 | 5.1 | .780 | 1.7 | 3.1 | 4.9 | 8.0 | 1.3 | 0.4 | 3.3 | 2.5 | 16.1 |
| 2010-11 | 22 | OKC | NBA | PG | 82 | 82 | 34.7 | 7.5 | 17.0 | .442 | 0.4 | 1.3 | .330 | 7.1 | 15.7 | .451 | .454 | 6.5 | 7.7 | .842 | 1.5 | 3.1 | 4.6 | 8.2 | 1.9 | 0.4 | 3.9 | 2.5 | 21.9 |
| 2011-12 | 23 | OKC | NBA | PG | 66 | 66 | 35.3 | 8.8 | 19.2 | .457 | 0.9 | 3.0 | .316 | 7.8 | 16.2 | .482 | .481 | 5.2 | 6.3 | .823 | 1.5 | 3.1 | 4.6 | 5.5 | 1.7 | 0.3 | 3.6 | 2.2 | 23.6 |
| 2012-13 | 24 | OKC | NBA | PG | 82 | 82 | 34.9 | 8.2 | 18.7 | .438 | 1.2 | 3.7 | .323 | 7.0 | 15.1 | .466 | .470 | 5.6 | 7.0 | .800 | 1.4 | 3.9 | 5.2 | 7.4 | 1.8 | 0.3 | 3.3 | 2.3 | 23.2 |
| 2013-14 | 25 | OKC | NBA | PG | 46 | 46 | 30.7 | 7.5 | 17.2 | .437 | 1.5 | 4.7 | .318 | 6.0 | 12.5 | .482 | .480 | 5.3 | 6.4 | .826 | 1.2 | 4.5 | 5.7 | 6.9 | 1.9 | 0.2 | 3.8 | 2.3 | 21.8 |
| 2014-15 | 26 | OKC | NBA | PG | 67 | 67 | 34.4 | 9.4 | 22.0 | .426 | 1.3 | 4.3 | .299 | 8.1 | 17.7 | .457 | .455 | 8.1 | 9.8 | .835 | 1.9 | 5.4 | 7.3 | 8.6 | 2.1 | 0.2 | 4.4 | 2.7 | 28.1 |
| 2015-16 | 27 | OKC | NBA | PG | 80 | 80 | 34.4 | 8.2 | 18.1 | .454 | 1.3 | 4.3 | .296 | 6.9 | 13.8 | .503 | .489 | 5.8 | 7.2 | .812 | 1.8 | 6.0 | 7.8 | 10.4 | 2.0 | 0.3 | 4.3 | 2.5 | 23.5 |
| 2016-17 | 28 | OKC | NBA | PG | 81 | 81 | 34.6 | 10.2 | 24.0 | .425 | 2.5 | 7.2 | .343 | 7.7 | 16.8 | .459 | .476 | 8.8 | 10.4 | .845 | 1.7 | 9.0 | 10.7 | 10.4 | 1.6 | 0.4 | 5.4 | 2.3 | 31.6 |
| 2017-18 | 29 | OKC | NBA | PG | 80 | 80 | 36.4 | 9.5 | 21.1 | .449 | 1.2 | 4.1 | .298 | 8.3 | 17.0 | .485 | .477 | 5.2 | 7.1 | .737 | 1.9 | 8.2 | 10.1 | 10.3 | 1.8 | 0.3 | 4.8 | 2.5 | 25.4 |
| 2018-19 | 30 | OKC | NBA | PG | 73 | 73 | 36.0 | 8.6 | 20.2 | .428 | 1.6 | 5.6 | .290 | 7.0 | 14.5 | .481 | .468 | 4.1 | 6.2 | .656 | 1.5 | 9.6 | 11.1 | 10.7 | 1.9 | 0.5 | 4.5 | 3.4 | 22.9 |
| 2019-20 | 31 | HOU | NBA | PG | 57 | 57 | 35.9 | 10.6 | 22.5 | .472 | 1.0 | 3.7 | .258 | 9.6 | 18.7 | .514 | .493 | 5.1 | 6.7 | .763 | 1.8 | 6.2 | 7.9 | 7.0 | 1.6 | 0.4 | 4.5 | 3.5 | 27.2 |
| Career | | | NBA | | 878 | 861 | 34.6 | 8.2 | 18.8 | .437 | 1.1 | 3.7 | .305 | 7.1 | 15.2 | .469 | .467 | 5.7 | 7.1 | .799 | 1.7 | 5.4 | 7.1 | 8.3 | 1.7 | 0.3 | 4.1 | 2.6 | 23.2 |
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| 11 seasons | | OKC | NBA | | 821 | 804 | 34.5 | 8.1 | 18.6 | .434 | 1.1 | 3.6 | .308 | 6.9 | 14.9 | .465 | .465 | 5.7 | 7.1 | .801 | 1.7 | 5.3 | 7.0 | 8.4 | 1.8 | 0.3 | 4.1 | 2.5 | 23.0 |
| 1 season | | HOU | NBA | | 57 | 57 | 35.9 | 10.6 | 22.5 | .472 | 1.0 | 3.7 | .258 | 9.6 | 18.7 | .514 | .493 | 5.1 | 6.7 | .763 | 1.8 | 6.2 | 7.9 | 7.0 | 1.6 | 0.4 | 4.5 | 3.5 | 27.2 |