Regular Season Stats
| | | | | | | | | | |
|---|
| 2004-05 | T1EHL 15U | Honeybaked 15U AAA | 28 | 3 | 12 | 15 | - | - | - | 22 |
| 2005-06 | T1EBHL | Belle Tire Bantam Major AAA | 26 | 3 | 18 | 21 | 0 | - | - | 16 |
| 2006-07 | T1EHL U16 | Belle Tire U16 | 31 | 2 | 15 | 17 | 0 | - | - | 40 |
| 2007-08 | T1EHL U18 | Compuware U18 | 25 | 0 | 5 | 5 | 0 | - | - | 30 |
| 2008-09 | USHL | Indiana | 59 | 10 | 37 | 47 | 3 | 93 | 10.8% | 50 |
| 2009-10 | CCHA | Michigan State | 38 | 3 | 18 | 21 | - | - | - | 67 |
| 2010-11 | CCHA | Michigan State | 38 | 11 | 17 | 28 | - | - | - | 59 |
| 2011-12 | NHL | Boston Bruins | 2 | 0 | 1 | 1 | 0 | 3 | 0.0% | 0 |
| 2011-12 | CCHA | Michigan State | 38 | 12 | 22 | 34 | - | - | - | 51 |
| 2012-13 | NHL | Boston Bruins | 1 | 0 | 1 | 1 | -1 | 0 | 0.0% | 0 |
| 2012-13 | AHL | Providence | 63 | 13 | 32 | 45 | 0 | 147 | 8.8% | 37 |
| 2013-14 | NHL | Boston Bruins | 79 | 14 | 26 | 40 | 18 | 183 | 7.6% | 28 |
| 2014-15 | NHL | Boston Bruins | 78 | 12 | 27 | 39 | 13 | 205 | 5.9% | 20 |
| 2015-16 | NHL | Boston Bruins | 81 | 4 | 40 | 44 | 9 | 244 | 1.6% | 33 |
| 2016-17 | NHL | Boston Bruins | 81 | 8 | 43 | 51 | -10 | 208 | 3.9% | 37 |
| 2017-18 | NHL | Boston Bruins | 76 | 14 | 45 | 59 | 0 | 197 | 7.1% | 36 |
| 2018-19 | NHL | Boston Bruins | 64 | 6 | 47 | 53 | -2 | 151 | 4.0% | 33 |
| 2019-20 | NHL | Boston Bruins | 61 | 9 | 40 | 49 | -4 | 144 | 6.3% | 33 |
| 2020-21 | NHL | St. Louis Blues | 51 | 2 | 30 | 32 | 11 | 110 | 1.8% | 25 |
| 2021-22 | NHL | St. Louis Blues | 64 | 9 | 34 | 43 | 23 | 119 | 7.6% | 48 |
| 2022-23 | NHL | St. Louis Blues | 63 | 7 | 25 | 32 | -26 | 126 | 5.6% | 49 |
| 2023-24 | NHL | St. Louis Blues | 77 | 4 | 35 | 39 | -31 | 162 | 2.5% | 32 |
| NHL Totals | – | 778 | 89 | 394 | 483 | 0 | 1852 | 4.8% | 374 |
| AHL Totals | – | 63 | 13 | 32 | 45 | 0 | 147 | 8.8% | 37 |
| Juniors Totals | – | 59 | 10 | 37 | 47 | 3 | 93 | 10.8% | 50 |