Statistics
Regular Season Stats
| 2008-09 | Swe-U18 | Kramfors U18 | 14 | - | - | - | - | - | 54 | - | - | 0 |
| 2009-10 | Swe-U18 | Kramfors U18 | 2 | - | - | - | - | - | 11 | - | - | 0 |
| 2009-10 | Swe-U18 | MODO U18 | 8 | - | - | - | - | - | 26 | - | - | 1 |
| 2010-11 | Swe-U18 | MODO U18 | 24 | - | - | - | - | - | 51 | - | - | 5 |
| 2010-11 | Swe-Jr. | MODO Jr. | 1 | - | - | - | - | - | 2 | - | - | 0 |
| 2011-12 | Swe-Jr. | MODO Jr. | 25 | - | - | - | - | - | 70 | - | - | 1 |
| 2011-12 | Sweden | MODO | 3 | - | - | - | - | - | 8 | - | - | 0 |
| 2012-13 | Swe-Jr. | MODO Jr. | 23 | - | - | 18 | 5 | - | 46 | - | - | 2 |
| 2012-13 | Sweden-2 | Mora | 6 | - | - | 4 | 2 | - | 12 | - | - | 0 |
| 2012-13 | Sweden | MODO | 6 | - | - | 3 | 1 | - | 11 | - | - | 0 |
| 2013-14 | Sweden | MODO | 35 | - | - | 17 | 16 | - | 71 | - | - | 3 |
| 2014-15 | SHL | MoDo Hockey | 35 | - | - | 12 | 20 | - | 100 | 1049 | 0.905 | 1 |
| 2015-16 | NHL | Buffalo Sabres | 20 | 0 | 0 | 8 | 10 | 2 | 49 | 565 | 0.913 | 0 |
| 2015-16 | AHL | Rochester Americans | 28 | - | - | 10 | 16 | 0 | 90 | 921 | 0.902 | 0 |
| 2016-17 | NHL | Buffalo Sabres | 1 | 0 | 0 | 0 | 1 | 0 | 3 | 36 | 0.917 | 0 |
| 2016-17 | AHL | Rochester Americans | 55 | - | - | 26 | 27 | 4 | 153 | 1678 | 0.909 | 1 |
| 2017-18 | NHL | Buffalo Sabres | 5 | 0 | 0 | 1 | 2 | 0 | 8 | 123 | 0.935 | 0 |
| 2017-18 | AHL | Rochester Americans | 44 | - | - | 21 | 12 | 14 | 105 | 1347 | 0.922 | 2 |
| 2018-19 | NHL | Buffalo Sabres | 37 | 1 | 0 | 15 | 14 | 5 | 109 | 1146 | 0.905 | 2 |
| 2019-20 | NHL | Buffalo Sabres | 34 | 0 | 4 | 17 | 14 | 3 | 91 | 1066 | 0.915 | 1 |
| 2020-21 | NHL | Buffalo Sabres | 20 | 0 | 0 | 9 | 6 | 3 | 49 | 591 | 0.917 | 0 |
| 2021-22 | NHL | Boston Bruins | 41 | 1 | 4 | 26 | 10 | 2 | 95 | 1140 | 0.917 | 1 |
| 2022-23 | NHL | Boston Bruins | 49 | 0 | 2 | 40 | 6 | 1 | 91 | 1457 | 0.938 | 2 |
| 2023-24 | NHL | Boston Bruins | 40 | 1 | 2 | 22 | 10 | 7 | 103 | 1207 | 0.915 | 2 |
| 2024-25 | NHL | Ottawa Senators | 44 | 2 | 0 | 25 | 14 | 3 | 112 | 1229 | 0.910 | 4 |
| 2025-26 | NHL | Ottawa Senators | 28 | 0 | 2 | 14 | 8 | 5 | 82 | 687 | 0.881 | 1 |
| NHL Totals | – | 319 | 5 | 14 | 177 | 95 | 31 | 792 | 9247 | 0.914 | 13 | |
| AHL Totals | – | 127 | - | - | 57 | 55 | 18 | 348 | 3946 | 0.912 | 3 | |
Playoff Stats
| 2009-10 | Swe-U18 | MODO U18 | 2 | - | - | - | - | - | 7 | - | - | 0 |
| 2010-11 | Swe-U18 | MODO U18 | 2 | - | - | - | - | - | 6 | - | - | 0 |
| 2011-12 | Swe-Jr. | MODO Jr. | 5 | - | - | - | - | - | 9 | - | - | 1 |
| 2012-13 | Swe-Jr. | MODO Jr. | 5 | - | - | 4 | 1 | - | 1 | - | - | - |
| 2012-13 | Sweden | MODO | 2 | - | - | 1 | 1 | - | 3 | - | - | 0 |
| 2013-14 | Sweden | MODO | 2 | - | - | 0 | 2 | - | 9 | - | - | 0 |
| 2014-15 | SHL | MoDo Hockey | 4 | - | - | 4 | 0 | - | 2 | 98 | 0.980 | 2 |
| 2017-18 | AHL | Rochester Americans | 3 | - | - | 0 | 3 | 0 | 16 | 80 | 0.800 | 0 |
| 2021-22 | NHL | Boston Bruins | 2 | 0 | 0 | 0 | 2 | 0 | 8 | 57 | 0.860 | 0 |
| 2022-23 | NHL | Boston Bruins | 6 | 1 | 10 | 3 | 3 | 0 | 20 | 192 | 0.896 | 0 |
| 2023-24 | NHL | Boston Bruins | 2 | 0 | 0 | 0 | 1 | 0 | 5 | 44 | 0.886 | 0 |
| 2024-25 | NHL | Ottawa Senators | 6 | 0 | 0 | 2 | 4 | 0 | 18 | 150 | 0.880 | 1 |
| NHL Totals | – | 16 | 1 | 10 | 5 | 10 | 0 | 51 | 443 | 0.885 | 1 | |
| AHL Totals | – | 3 | - | - | 0 | 3 | 0 | 16 | 80 | 0.800 | 0 | |
Last 5 Games
| Season | Opponent | Date | DEC | GS | GA | SA | SV% | PIM | TOI |
|---|---|---|---|---|---|---|---|---|---|
| Regular | @ TOR | Dec 27 | - | 1 | 4 | 14 | .714 | 0 | 27:28 |
| Regular | vs BUF | Dec 23 | O | 1 | 3 | 25 | .880 | 0 | 60:31 |
| Regular | @ BOS | Dec 21 | W | 1 | 2 | 20 | .900 | 0 | 60:00 |
| Regular | vs PIT | Dec 18 | W | 1 | 0 | 25 | 1.000 | 0 | 60:00 |
| Regular | @ WPG | Dec 15 | W | 1 | 2 | 25 | .920 | 0 | 61:28 |
Awards
| Year | Award |
|---|---|
| 2022-23 | Vezina Trophy |
| 2022-23 | William M. Jennings Trophy |