| Season | Team | League | GP | G | A | TP | PIM | Playoffs | GP | G | A | TP | PIM | |
| 2006-2007 | Weymouth High | USHS-MA | - | - | - | - | - | | | ||||||
| 2007-2008 | Thayer Academy | USHS-Prep | - | 14 | 23 | 37 | - | | | ||||||
| 2008-2009 | Thayer Academy | USHS-Prep | 26 | 20 | 28 | 48 | 4 | | | ||||||
| 2009-2010 | South Shore Kings | EJHL | 42 | 21 | 42 | 63 | 50 | | | Playoffs | 4 | 2 | 1 | 3 | 0 |
| U.S. National U18 Team | NTDP | 4 | 1 | 0 | 1 | 2 | | | |||||||
| 2010-2011 | Boston Univ. | NCAA | 37 | 7 | 19 | 26 | 34 | | | ||||||
| USA U20 | WJC-20 | 6 | 2 | 4 | 6 | 4 | | | |||||||
| 2011-2012 | Boston Univ. | NCAA | 16 | 3 | 11 | 14 | 20 | | | ||||||
| Saint John Sea Dogs | QMJHL | 23 | 15 | 23 | 38 | 8 | | | Playoffs | 17 | 15 | 19 | 34 | 8 | |
| Saint John Sea Dogs | Memorial Cup | 4 | 0 | 4 | 4 | 2 | | | |||||||
| USA U20 | WJC-20 | 6 | 4 | 1 | 5 | 2 | | | |||||||
| 2012-2013 | Minnesota Wild | NHL | 37 | 8 | 6 | 14 | 28 | | | Playoffs | 5 | 0 | 2 | 2 | 2 |
| Houston Aeros | AHL | 47 | 14 | 11 | 25 | 22 | | | |||||||
| 2013-2014 | Minnesota Wild | NHL | 70 | 12 | 18 | 30 | 33 | | | Playoffs | 13 | 3 | 4 | 7 | 6 |
| 2014-2015 | Minnesota Wild | NHL | 82 | 11 | 24 | 35 | 39 | | | Playoffs | 10 | 1 | 1 | 2 | 0 |
| USA | WC | 5 | 3 | 2 | 5 | 6 | | | |||||||
| 2015-2016 | Minnesota Wild | NHL | 82 | 21 | 21 | 42 | 16 | | | Playoffs | 6 | 1 | 1 | 2 | 6 |
| 2016-2017 | Minnesota Wild | NHL | 82 | 18 | 38 | 56 | 36 | | | Playoffs | 5 | 2 | 0 | 2 | 2 |
| 2017-2018 | Minnesota Wild | NHL | 66 | 11 | 26 | 37 | 18 | | | Playoffs | 5 | 0 | 0 | 0 | 2 |
| 2018-2019 | Minnesota Wild | NHL | 60 | 10 | 18 | 28 | 16 | | | ||||||
| Boston Bruins | NHL | 21 | 2 | 4 | 6 | 4 | | | Playoffs | 24 | 9 | 7 | 16 | 12 | |
| 2019-2020 | Boston Bruins | NHL | 70 | 16 | 21 | 37 | 21 | | | Playoffs | 13 | 3 | 2 | 5 | 2 |
| 2020-2021 | Boston Bruins | NHL | 51 | 6 | 10 | 16 | 20 | | | Playoffs | 11 | 2 | 1 | 3 | 6 |
| 2021-2022 | Boston Bruins | NHL | 82 | 16 | 28 | 44 | 32 | | | Playoffs | 7 | 2 | 4 | 6 | 2 |
| 2022-2023 | Boston Bruins | NHL | 82 | 16 | 29 | 45 | 30 | | | Playoffs | 7 | 1 | 1 | 2 | 4 |
| 2023-2024 | Boston Bruins | NHL | 82 | 25 | 35 | 60 | 38 | | | Playoffs | 13 | 1 | 4 | 5 | 12 |
| 2024-2025 | Boston Bruins | NHL | 64 | 15 | 7 | 22 | 18 | | | ||||||
| Colorado Avalanche | NHL | 19 | 2 | 11 | 13 | 6 | | | Playoffs | 7 | 1 | 0 | 1 | 2 | |
| 2025-2026 | Columbus Blue Jackets | NHL | 82 | 20 | 38 | 58 | 14 | | | ||||||
| 2026-2027 | Columbus Blue Jackets | NHL | - | - | - | - | - | | |