
| 2004-05 | U16 SM | Malmö Redhawks U16 | 3 | 0 | 2 | 2 | - | - | - | 4 |
| 2005-06 | Swe-U18 | Malmo U18 | 12 | 0 | 7 | 7 | - | - | - | 0 |
| 2006-07 | Swe-U18 | Farjestad U18 | 12 | 5 | 9 | 14 | - | - | - | 8 |
| 2007-08 | Swe-U18 | Farjestad U18 | 24 | 12 | 26 | 38 | - | - | - | 16 |
| 2007-08 | Sweden-3 | Skare | 19 | 2 | 10 | 12 | - | - | - | 10 |
| 2008-09 | Swe-U18 | Farjestad U18 | 2 | 2 | 0 | 2 | - | - | - | 0 |
| 2008-09 | Sweden-3 | Skare | 5 | 5 | 5 | 10 | - | - | - | 0 |
| 2008-09 | Sweden | Farjestad | 45 | 5 | 5 | 10 | - | - | - | 10 |
| 2009-10 | Sweden | Farjestad | 42 | 10 | 10 | 20 | - | - | - | 10 |
| 2010-11 | NHL | Washington Capitals | 69 | 13 | 14 | 27 | 2 | 102 | 12.8% | 10 |
| 2010-11 | AHL | Hershey | 2 | 0 | 0 | 0 | 1 | 3 | 0.0% | 0 |
| 2011-12 | NHL | Washington Capitals | 80 | 14 | 32 | 46 | -5 | 90 | 15.6% | 8 |
| 2012-13 | NHL | Washington Capitals | 34 | 6 | 16 | 22 | 3 | 40 | 15.0% | 4 |
| 2012-13 | Sweden-2 | Bofors | 16 | 8 | 10 | 18 | - | - | - | 8 |
| 2013-14 | NHL | Washington Capitals | 80 | 8 | 36 | 44 | -21 | 107 | 7.5% | 4 |
| 2014-15 | NHL | Washington Capitals | 82 | 20 | 27 | 47 | 6 | 138 | 14.5% | 10 |
| 2015-16 | NHL | Washington Capitals | 74 | 17 | 29 | 46 | 12 | 132 | 12.9% | 16 |
| 2016-17 | NHL | Washington Capitals | 82 | 24 | 34 | 58 | 25 | 129 | 18.6% | 10 |
| 2017-18 | NHL | New Jersey Devils | 29 | 5 | 9 | 14 | -11 | 42 | 11.9% | 14 |
| 2018-19 | NHL | New Jersey Devils | 48 | 12 | 15 | 27 | -15 | 103 | 11.7% | 8 |
| 2018-19 | NHL | Boston Bruins | 10 | 1 | 2 | 3 | -1 | 12 | 8.3% | 0 |
| 2019-20 | NHL | Buffalo Sabres | 60 | 9 | 21 | 30 | -12 | 87 | 10.3% | 20 |
| 2020-21 | NHL | Minnesota Wild | 36 | 6 | 8 | 14 | -10 | 46 | 13.0% | 4 |
| 2021-22 | NHL | Seattle Kraken | 51 | 6 | 17 | 23 | -22 | 81 | 7.4% | 4 |
| 2021-22 | NHL | Washington Capitals | 18 | 3 | 3 | 6 | -4 | 30 | 10.0% | 0 |
| 2022-23 | NHL | Washington Capitals | 60 | 13 | 15 | 28 | -3 | 95 | 13.7% | 8 |
| 2022-23 | NHL | Minnesota Wild | 20 | 6 | 12 | 18 | 6 | 42 | 14.3% | 0 |
| 2023-24 | NHL | Minnesota Wild | 78 | 11 | 19 | 30 | -15 | 112 | 9.8% | 22 |
| 2024-25 | NHL | Minnesota Wild | 72 | 11 | 23 | 34 | -7 | 121 | 9.1% | 12 |
| 2025-26 | NHL | Minnesota Wild | 43 | 12 | 20 | 32 | 21 | 65 | 18.5% | 8 |
| NHL Totals | – | 1026 | 197 | 352 | 549 | -51 | 1574 | 12.5% | 162 | |
| AHL Totals | – | 2 | 0 | 0 | 0 | 1 | 3 | 0.0% | 0 | |
| 2005-06 | Swe-U18 | Malmo U18 | 6 | 0 | 4 | 4 | 0 | 0 | 0.0% | 0 |
| 2006-07 | Swe-U18 | Farjestad U18 | 8 | 7 | 3 | 10 | 0 | 0 | 0.0% | 2 |
| 2007-08 | Swe-U18 | Farjestad U18 | 8 | 4 | 8 | 12 | 0 | 0 | 0.0% | 0 |
| 2007-08 | Sweden | Farjestad | 3 | 0 | 0 | 0 | 0 | 0 | 0.0% | 0 |
| 2008-09 | Sweden | Farjestad | 6 | 0 | 0 | 0 | 0 | 0 | 0.0% | 0 |
| 2009-10 | Sweden | Farjestad | 7 | 0 | 5 | 5 | - | - | - | 2 |
| 2010-11 | NHL | Washington Capitals | 9 | 2 | 4 | 6 | -2 | 14 | 14.3% | 0 |
| 2011-12 | NHL | Washington Capitals | 14 | 1 | 2 | 3 | -6 | 22 | 4.6% | 0 |
| 2012-13 | NHL | Washington Capitals | 7 | 1 | 1 | 2 | -3 | 13 | 7.7% | 0 |
| 2014-15 | NHL | Washington Capitals | 14 | 1 | 3 | 4 | 2 | 18 | 5.6% | 2 |
| 2015-16 | NHL | Washington Capitals | 12 | 2 | 5 | 7 | -2 | 25 | 8.0% | 2 |
| 2016-17 | NHL | Washington Capitals | 13 | 2 | 6 | 8 | -1 | 23 | 8.7% | 2 |
| 2017-18 | NHL | New Jersey Devils | 3 | 0 | 0 | 0 | -2 | 4 | 0.0% | 0 |
| 2018-19 | NHL | Boston Bruins | 22 | 4 | 7 | 11 | 0 | 36 | 11.1% | 0 |
| 2020-21 | NHL | Minnesota Wild | 3 | 0 | 0 | 0 | -1 | 1 | 0.0% | 0 |
| 2021-22 | NHL | Washington Capitals | 6 | 1 | 1 | 2 | 1 | 9 | 11.1% | 0 |
| 2022-23 | NHL | Minnesota Wild | 6 | 2 | 0 | 2 | -5 | 14 | 14.3% | 0 |
| 2024-25 | NHL | Minnesota Wild | 5 | 0 | 2 | 2 | 0 | 5 | 0.0% | 0 |
| NHL Totals | – | 114 | 16 | 31 | 47 | -19 | 184 | 8.7% | 6 | |
| Season | Opponent | Date | G | A | P | +/- | PIM | PPG | SHG | S | Shifts | TOI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Regular | @ SEA | Jan 8 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 19 | 16:18 |
| Regular | @ LAK | Jan 5 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 1 | 15 | 12:29 |
| Regular | @ LAK | Jan 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 20 | 16:00 |
| Regular | @ ANA | Jan 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 | 18 | 15:56 |
| Regular | @ SJS | Dec 31 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 1 | 20 | 18:04 |