
| 1994-95 | AMHL | Edm. Pats | 33 | 27 | 31 | 58 | - | - | - | 42 |
| 1995-96 | AMHL | Edm. Pats | 34 | 23 | 24 | 47 | - | - | - | 44 |
| 1996-97 | WHL | Medicine Hat | 71 | 16 | 23 | 39 | - | - | - | 64 |
| 1997-98 | WHL | Medicine Hat | 72 | 34 | 32 | 66 | -34 | - | - | 93 |
| 1997-98 | AHL | Hamilton | 4 | 0 | 0 | 0 | -2 | 1 | 0.0% | 8 |
| 1998-99 | WHL | Medicine Hat | 37 | 18 | 22 | 40 | -12 | - | - | 84 |
| 1998-99 | WHL | Brandon | 21 | 14 | 12 | 26 | -4 | - | - | 32 |
| 1999-00 | AHL | Hamilton | 78 | 15 | 13 | 28 | -27 | 152 | 9.9% | 77 |
| 2000-01 | NHL | Edmonton Oilers | 1 | 0 | 0 | 0 | 0 | 0 | 0.0% | 0 |
| 2000-01 | AHL | Hamilton | 78 | 29 | 25 | 54 | -14 | 227 | 12.8% | 93 |
| 2001-02 | NHL | Edmonton Oilers | 3 | 1 | 0 | 1 | -3 | 3 | 33.3% | 0 |
| 2001-02 | AHL | Hamilton | 77 | 26 | 51 | 77 | 28 | - | - | 158 |
| 2002-03 | NHL | Edmonton Oilers | 66 | 14 | 9 | 23 | -2 | 90 | 15.6% | 36 |
| 2003-04 | NHL | Edmonton Oilers | 60 | 4 | 8 | 12 | -1 | 79 | 5.1% | 57 |
| 2004-05 | Italy | Varese | 15 | 7 | 3 | 10 | - | - | - | 34 |
| 2005-06 | NHL | Columbus Blue Jackets | 80 | 17 | 13 | 30 | -10 | 127 | 13.4% | 95 |
| 2006-07 | NHL | Columbus Blue Jackets | 82 | 15 | 21 | 36 | 2 | 151 | 9.9% | 91 |
| 2007-08 | NHL | Columbus Blue Jackets | 81 | 14 | 17 | 31 | -5 | 198 | 7.1% | 98 |
| 2008-09 | NHL | Columbus Blue Jackets | 49 | 8 | 14 | 22 | 8 | 115 | 7.0% | 41 |
| 2009-10 | NHL | Columbus Blue Jackets | 39 | 8 | 9 | 17 | -7 | 92 | 8.7% | 47 |
| 2009-10 | NHL | Washington Capitals | 39 | 7 | 10 | 17 | 6 | 68 | 10.3% | 51 |
| 2010-11 | NHL | Washington Capitals | 81 | 10 | 16 | 26 | -10 | 162 | 6.2% | 64 |
| 2011-12 | NHL | Washington Capitals | 82 | 20 | 19 | 39 | 4 | 205 | 9.8% | 78 |
| 2012-13 | NHL | Washington Capitals | 47 | 3 | 11 | 14 | -5 | 92 | 3.3% | 48 |
| 2012-13 | CzRep | Chomutov | 5 | 1 | 0 | 1 | - | - | - | 10 |
| 2013-14 | NHL | Washington Capitals | 82 | 15 | 27 | 42 | 4 | 167 | 9.0% | 36 |
| 2014-15 | NHL | Washington Capitals | 77 | 7 | 12 | 19 | -1 | 96 | 7.3% | 51 |
| 2015-16 | NHL | Washington Capitals | 82 | 20 | 20 | 40 | 0 | 165 | 12.1% | 22 |
| 2016-17 | NHL | New York Islanders | 82 | 20 | 13 | 33 | 1 | 121 | 16.5% | 40 |
| 2017-18 | NHL | New York Islanders | 58 | 2 | 9 | 11 | -11 | 70 | 2.9% | 35 |
| 2017-18 | NHL | Anaheim Ducks | 16 | 1 | 1 | 2 | -1 | 9 | 11.1% | 2 |
| NHL Totals | – | 1107 | 186 | 229 | 415 | -31 | 2010 | 9.3% | 892 | |
| AHL Totals | – | 237 | 70 | 89 | 159 | -15 | 380 | 18.4% | 336 | |
| Juniors Totals | – | 201 | 82 | 89 | 171 | -50 | - | - | 273 | |
| 1996-97 | WHL | Medicine Hat | 4 | 0 | 1 | 1 | - | - | - | 4 |
| 1998-99 | WHL | Brandon | 5 | 4 | 1 | 5 | - | - | - | 8 |
| 1999-00 | AHL | Hamilton | 10 | 0 | 2 | 2 | - | - | - | 12 |
| 2001-02 | AHL | Hamilton | 15 | 4 | 6 | 10 | - | - | - | 10 |
| 2002-03 | NHL | Edmonton Oilers | 2 | 0 | 2 | 2 | 2 | 3 | 0.0% | 0 |
| 2004-05 | Italy | Varese | 5 | 2 | 1 | 3 | - | - | - | 31 |
| 2008-09 | NHL | Columbus Blue Jackets | 4 | 0 | 1 | 1 | 0 | 11 | 0.0% | 2 |
| 2009-10 | NHL | Washington Capitals | 7 | 1 | 2 | 3 | 2 | 15 | 6.7% | 2 |
| 2010-11 | NHL | Washington Capitals | 9 | 2 | 2 | 4 | -3 | 15 | 13.3% | 2 |
| 2011-12 | NHL | Washington Capitals | 14 | 4 | 3 | 7 | 5 | 28 | 14.3% | 6 |
| 2012-13 | NHL | Washington Capitals | 7 | 1 | 2 | 3 | 1 | 15 | 6.7% | 4 |
| 2014-15 | NHL | Washington Capitals | 14 | 3 | 4 | 7 | 4 | 35 | 8.6% | 4 |
| 2015-16 | NHL | Washington Capitals | 12 | 1 | 1 | 2 | -1 | 17 | 5.9% | 12 |
| 2017-18 | NHL | Anaheim Ducks | 2 | 0 | 0 | 0 | -2 | 0 | 0.0% | 0 |
| NHL Totals | – | 71 | 12 | 17 | 29 | 8 | 139 | 8.6% | 32 | |
| AHL Totals | – | 25 | 4 | 8 | 12 | - | - | - | 22 | |
| Juniors Totals | – | 9 | 4 | 2 | 6 | - | - | - | 12 | |
| Season | Opponent | Date | G | A | P | +/- | PIM | PPG | SHG | S | Shifts | TOI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Playoffs | @ SJS | Apr 18 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 8 | 4:55 |
| Playoffs | @ SJS | Apr 16 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 15 | 8:50 |
| Regular | vs DAL | Apr 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 9 | 6:02 |
| Regular | vs MIN | Apr 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 5:55 |
| Regular | vs COL | Apr 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 9 | 4:41 |