Statistics
Regular Season Stats
| 2010-11 | Jr. C SM-sarja | KalPa U16 | 26 | 14 | 8 | 22 | 0 | - | - | 10 |
| 2011-12 | Fin-U18 | KalPa U18 | 27 | 13 | 11 | 24 | - | - | - | 8 |
| 2012-13 | Fin-U18 | KalPa U18 | 3 | 3 | 3 | 6 | - | - | - | 0 |
| 2012-13 | Fin-Jr. | KalPa Jr. | 36 | 14 | 15 | 29 | - | - | - | 16 |
| 2012-13 | Finland | KalPa | 13 | 4 | 0 | 4 | - | - | - | 2 |
| 2013-14 | Fin-U18 | KalPa U18 | 2 | 5 | 1 | 6 | - | - | - | 0 |
| 2013-14 | Finland | KalPa | 47 | 7 | 7 | 14 | - | - | - | 10 |
| 2014-15 | Finland | KalPa | 41 | 11 | 10 | 21 | - | - | - | 14 |
| 2014-15 | AHL | Wilkes-Barre | 4 | 1 | 1 | 2 | -1 | 9 | 11.1% | 0 |
| 2015-16 | NHL | Toronto Maple Leafs | 9 | 0 | 0 | 0 | -3 | 14 | 0.0% | 2 |
| 2015-16 | AHL | Toronto | 44 | 9 | 16 | 25 | 7 | 65 | 13.8% | 8 |
| 2016-17 | NHL | Toronto Maple Leafs | 8 | 1 | 0 | 1 | -2 | 11 | 9.1% | 0 |
| 2016-17 | AHL | Toronto Marlies | 43 | 18 | 25 | 43 | 2 | - | - | 16 |
| 2017-18 | NHL | Toronto Maple Leafs | 38 | 7 | 2 | 9 | -1 | 55 | 12.7% | 4 |
| 2017-18 | AHL | Toronto Marlies | 28 | 12 | 12 | 24 | 8 | - | - | 12 |
| 2018-19 | NHL | Toronto Maple Leafs | 78 | 20 | 24 | 44 | 12 | 174 | 11.5% | 27 |
| 2019-20 | NHL | Toronto Maple Leafs | 69 | 13 | 23 | 36 | 0 | 121 | 10.7% | 22 |
| 2020-21 | NHL | Pittsburgh Penguins | 40 | 11 | 19 | 30 | 15 | 68 | 16.2% | 7 |
| 2021-22 | NHL | Pittsburgh Penguins | 79 | 11 | 21 | 32 | 2 | 129 | 8.5% | 16 |
| 2022-23 | NHL | Pittsburgh Penguins | 43 | 7 | 13 | 20 | -8 | 69 | 10.1% | 8 |
| 2022-23 | NHL | St. Louis Blues | 23 | 8 | 6 | 14 | 0 | 47 | 17.0% | 10 |
| 2023-24 | NHL | St. Louis Blues | 73 | 6 | 16 | 22 | -5 | 99 | 6.1% | 14 |
| 2024-25 | NHL | St. Louis Blues | 10 | 1 | 0 | 1 | -6 | 11 | 9.1% | 2 |
| 2024-25 | NHL | Edmonton Oilers | 57 | 5 | 8 | 13 | -16 | 55 | 9.1% | 14 |
| 2025-26 | NHL | Edmonton Oilers | 8 | 1 | 4 | 5 | -1 | 8 | 12.5% | 0 |
| NHL Totals | – | 535 | 91 | 136 | 227 | -13 | 861 | 10.6% | 126 | |
| AHL Totals | – | 119 | 40 | 54 | 94 | 16 | 74 | 54.1% | 36 | |
Playoff Stats
| 2011-12 | Fin-U18 | KalPa U18 | 2 | 0 | 0 | 0 | - | - | - | 0 |
| 2012-13 | Finland | KalPa | 4 | 0 | 1 | 1 | - | - | - | 2 |
| 2013-14 | Fin-U18 | KalPa U18 | 4 | 6 | 1 | 7 | - | - | - | 0 |
| 2014-15 | Finland | KalPa | 6 | 0 | 5 | 5 | - | - | - | 2 |
| 2014-15 | AHL | Wilkes-Barre | 7 | 3 | 2 | 5 | 0 | 12 | 25.0% | 0 |
| 2015-16 | AHL | Toronto | 14 | 3 | 5 | 8 | 1 | 14 | 21.4% | 2 |
| 2016-17 | NHL | Toronto Maple Leafs | 6 | 2 | 0 | 2 | -2 | 8 | 25.0% | 0 |
| 2016-17 | AHL | Toronto Marlies | 9 | 2 | 6 | 8 | -2 | - | - | 8 |
| 2017-18 | NHL | Toronto Maple Leafs | 7 | 1 | 0 | 1 | -3 | 6 | 16.7% | 0 |
| 2018-19 | NHL | Toronto Maple Leafs | 7 | 1 | 1 | 2 | -1 | 18 | 5.6% | 2 |
| 2019-20 | NHL | Toronto Maple Leafs | 5 | 0 | 2 | 2 | -2 | 9 | 0.0% | 14 |
| 2020-21 | NHL | Pittsburgh Penguins | 6 | 1 | 2 | 3 | -3 | 12 | 8.3% | 0 |
| 2021-22 | NHL | Pittsburgh Penguins | 7 | 0 | 3 | 3 | 4 | 19 | 0.0% | 2 |
| 2024-25 | NHL | Edmonton Oilers | 12 | 3 | 3 | 6 | 4 | 27 | 11.1% | 18 |
| NHL Totals | – | 50 | 8 | 11 | 19 | -3 | 99 | 8.1% | 36 | |
| AHL Totals | – | 30 | 8 | 13 | 21 | -1 | 26 | 30.8% | 10 | |
Last 5 Games
| Season | Opponent | Date | G | A | P | +/- | PIM | PPG | SHG | S | Shifts | TOI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Regular | @ WPG | Jan 8 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 16 | 14:44 |
| Regular | vs NSH | Jan 6 | 1 | 1 | 2 | 0 | 0 | 0 | 0 | 3 | 18 | 14:33 |
| Regular | @ DET | Oct 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 5:43 |
| Regular | @ NJD | Oct 18 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 1 | 14 | 13:43 |
| Regular | @ NYI | Oct 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 17 | 11:17 |