| Season | Team | League | GP | G | A | TP | PIM | Playoffs | GP | G | A | TP | PIM | |
| 2009-2010 | New York Jr. Rangers | QC Int PW | 3 | 1 | 1 | 2 | 2 | | | ||||||
| 2011-2012 | Long Island Gulls 14U AAA | AYHL 14U | 15 | 0 | 4 | 4 | 20 | | | ||||||
| 2012-2013 | New Jersey Rockets | MetJHL | 42 | 15 | 39 | 54 | 47 | | | ||||||
| Elite Hockey Group | OHL Cup | 4 | 0 | 2 | 2 | 6 | | | |||||||
| New Jersey Rockets | AtJHL | 4 | 0 | 0 | 0 | 0 | | | Playoffs | 1 | 0 | 0 | 0 | 0 | |
| 2013-2014 | USNTDP Juniors | USHL | 34 | 4 | 6 | 10 | 56 | | | ||||||
| U.S. National U17 Team | NTDP | 54 | 7 | 12 | 19 | 58 | | | |||||||
| USA U17 | WHC-17 | 6 | 1 | 2 | 3 | 0 | | | |||||||
| 2014-2015 | USNTDP Juniors | USHL | 23 | 3 | 16 | 19 | 33 | | | ||||||
| U.S. National U18 Team | NTDP | 63 | 7 | 33 | 40 | 51 | | | |||||||
| USA U18 | WJC-18 | 7 | 0 | 4 | 4 | 2 | | | |||||||
| 2015-2016 | Boston Univ. | NCAA | 37 | 3 | 22 | 25 | 56 | | | ||||||
| USA U20 | WJC-20 | 7 | 0 | 0 | 0 | 0 | | | |||||||
| 2016-2017 | Boston Univ. | NCAA | 38 | 5 | 21 | 26 | 51 | | | ||||||
| Boston Bruins | NHL | 0 | 0 | 0 | 0 | 0 | | | Playoffs | 6 | 0 | 3 | 3 | 2 | |
| Providence Bruins | AHL | 4 | 0 | 2 | 2 | 4 | | | |||||||
| USA U20 | WJC-20 | 7 | 2 | 4 | 6 | 14 | | | |||||||
| USA | WC | 8 | 0 | 1 | 1 | 6 | | | |||||||
| 2017-2018 | Boston Bruins | NHL | 63 | 7 | 25 | 32 | 53 | | | Playoffs | 12 | 1 | 4 | 5 | 6 |
| USA | WC | 6 | 3 | 6 | 9 | 4 | | | |||||||
| 2018-2019 | Boston Bruins | NHL | 54 | 7 | 21 | 28 | 45 | | | Playoffs | 23 | 2 | 6 | 8 | 16 |
| 2019-2020 | Boston Bruins | NHL | 67 | 5 | 27 | 32 | 41 | | | Playoffs | 13 | 1 | 3 | 4 | 24 |
| 2020-2021 | Boston Bruins | NHL | 51 | 5 | 25 | 30 | 38 | | | Playoffs | 11 | 1 | 11 | 12 | 4 |
| 2021-2022 | Boston Bruins | NHL | 78 | 10 | 46 | 56 | 66 | | | Playoffs | 6 | 0 | 5 | 5 | 4 |
| 2022-2023 | Boston Bruins | NHL | 67 | 7 | 45 | 52 | 54 | | | Playoffs | 7 | 0 | 5 | 5 | 8 |
| 2023-2024 | Boston Bruins | NHL | 74 | 12 | 35 | 47 | 86 | | | Playoffs | 13 | 1 | 5 | 6 | 20 |
| 2024-2025 | Boston Bruins | NHL | - | - | - | - | - | | |