| Position | R |
| Birth city | Kuopio, undefined, FIN |
| Birth date | 1996-07-23 (30) |
| Height | 6'1'' |
| weight (lb) | 197 |
| Drafted | pick 22 round 1 by PIT in 2014 |
season | L | T. | GP | G | A | PTS | +/- | pim |
|---|---|---|---|---|---|---|---|---|
| 2015-16 | NHL | Toronto Maple Leafs | 9 | 0 | 0 | 0 | -3 | 2 |
| 2016-17 | NHL | Toronto Maple Leafs | 8 | 1 | 0 | 1 | -2 | 0 |
| 2017-18 | NHL | Toronto Maple Leafs | 38 | 7 | 2 | 9 | -1 | 4 |
| 2018-19 | NHL | Toronto Maple Leafs | 78 | 20 | 24 | 44 | 12 | 27 |
| 2019-20 | NHL | Toronto Maple Leafs | 69 | 13 | 23 | 36 | 0 | 22 |
| 2020-21 | NHL | Pittsburgh Penguins | 40 | 11 | 19 | 30 | 15 | 7 |
| 2021-22 | NHL | Pittsburgh Penguins | 79 | 11 | 21 | 32 | 2 | 16 |
| 2022-23 | NHL | Pittsburgh Penguins | 43 | 7 | 13 | 20 | -8 | 8 |
| 2022-23 | NHL | St. Louis Blues | 23 | 8 | 6 | 14 | 0 | 10 |
| 2023-24 | NHL | St. Louis Blues | 73 | 6 | 16 | 22 | -5 | 14 |
| 2024-25 | NHL | St. Louis Blues | 10 | 1 | 0 | 1 | -6 | 2 |
| 2024-25 | NHL | Edmonton Oilers | 57 | 5 | 8 | 13 | -16 | 14 |
| 2025-26 | NHL | Edmonton Oilers | 41 | 8 | 9 | 17 | 5 | 14 |
| 2026-27 | NHL | Edmonton Oilers | 5 | 2 | 1 | 3 | -4 | 2 |
| NHL Total | 573 | 100 | 142 | 242 | -11 | 142 | ||
season | L | T. | GP | G | A | PTS | +/- | pim |
|---|---|---|---|---|---|---|---|---|
| 2016-17 | NHL | Toronto Maple Leafs | 6 | 2 | 0 | 2 | -2 | 0 |
| 2017-18 | NHL | Toronto Maple Leafs | 7 | 1 | 0 | 1 | -3 | 0 |
| 2018-19 | NHL | Toronto Maple Leafs | 7 | 1 | 1 | 2 | -1 | 2 |
| 2019-20 | NHL | Toronto Maple Leafs | 5 | 0 | 2 | 2 | -2 | 14 |
| 2020-21 | NHL | Pittsburgh Penguins | 6 | 1 | 2 | 3 | -3 | 0 |
| 2021-22 | NHL | Pittsburgh Penguins | 7 | 0 | 3 | 3 | 4 | 2 |
| 2024-25 | NHL | Edmonton Oilers | 12 | 3 | 3 | 6 | 4 | 18 |
| 2025-26 | NHL | Edmonton Oilers | 6 | 4 | 2 | 6 | 7 | 0 |
| NHL Total | 56 | 12 | 13 | 25 | 4 | 36 | ||