| Position | D |
| Birth city | Colorado Springs, Colorado, USA |
| Birth date | 1996-11-26 (29) |
| Height | 6'5'' |
| weight (lb) | 214 |
| Drafted | pick 7 round 2 by BOS in 2015 |
season | L | T. | GP | G | A | PTS | +/- | pim |
|---|---|---|---|---|---|---|---|---|
| 2016-17 | NHL | Boston Bruins | 82 | 6 | 10 | 16 | 9 | 59 |
| 2017-18 | NHL | Boston Bruins | 76 | 0 | 6 | 6 | 10 | 45 |
| 2018-19 | NHL | Boston Bruins | 72 | 2 | 8 | 10 | 22 | 47 |
| 2019-20 | NHL | Boston Bruins | 67 | 4 | 15 | 19 | 16 | 33 |
| 2020-21 | NHL | Boston Bruins | 27 | 3 | 1 | 4 | 1 | 12 |
| 2021-22 | NHL | Boston Bruins | 79 | 6 | 9 | 15 | 2 | 31 |
| 2022-23 | NHL | Boston Bruins | 75 | 3 | 13 | 16 | 44 | 38 |
| 2023-24 | NHL | Boston Bruins | 76 | 4 | 10 | 14 | 23 | 42 |
| 2024-25 | NHL | Boston Bruins | 63 | 1 | 8 | 9 | 2 | 24 |
| 2024-25 | NHL | Toronto Maple Leafs | 20 | 0 | 3 | 3 | 4 | 13 |
| 2025-26 | NHL | Toronto Maple Leafs | 55 | 0 | 7 | 7 | 4 | 37 |
| 2026-27 | NHL | St. Louis Blues | 6 | 0 | 1 | 1 | 1 | 19 |
| NHL Total | 698 | 29 | 91 | 120 | 138 | 400 | ||
season | L | T. | GP | G | A | PTS | +/- | pim |
|---|---|---|---|---|---|---|---|---|
| 2018-19 | NHL | Boston Bruins | 24 | 2 | 2 | 4 | 10 | 6 |
| 2019-20 | NHL | Boston Bruins | 13 | 0 | 1 | 1 | 0 | 8 |
| 2020-21 | NHL | Boston Bruins | 8 | 0 | 0 | 0 | 0 | 4 |
| 2021-22 | NHL | Boston Bruins | 7 | 0 | 1 | 1 | -5 | 6 |
| 2022-23 | NHL | Boston Bruins | 7 | 0 | 4 | 4 | 2 | 4 |
| 2023-24 | NHL | Boston Bruins | 13 | 3 | 1 | 4 | 4 | 6 |
| 2024-25 | NHL | Toronto Maple Leafs | 13 | 0 | 0 | 0 | -4 | 8 |
| NHL Total | 85 | 5 | 9 | 14 | 7 | 42 | ||