| Year | Event | GP | G | A | PTS | PIM |
|---|---|---|---|---|---|---|
| 2014 | IIHF Men's Under-18 World Championship | 7 | 5 | 2 | 7 | 4 |
| 2015 | IIHF World Junior Championship | 5 | 1 | 2 | 3 | 4 |
| IIHF Men's Under-18 World Championship | 7 | 8 | 7 | 15 | 0 | |
| 2016 | IIHF World Junior Championship | 7 | 7 | 4 | 11 | 2 |
| IIHF Men's World Championship | 10 | 6 | 3 | 9 | 2 | |
| TEAM USA TOTALS | 36 | 27 | 18 | 45 | 12 |
| Season | Team (League) | GP | G | A | PTS | PIM | PLAYOFFS | GP | G | A | PTS | PIM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2013-14 | U.S. National Under-18 Team* (USHL) | 20 | 12 | 5 | 18 | 8 | ||||||
| 2014-15 | U.S. National Under-18 Team* (USHL) | 60 | 55 | 62 | 117 | 30 | ||||||
| 2015-16 | Zurich Lions (Swiss-A) | 36 | 24 | 22 | 46 | 6 | 4 | 0 | 3 | 3 | 2 | |
| 2016-17 | Toronto Maple Leafs (NHL) | 82 | 40 | 29 | 69 | 14 | 6 | 4 | 1 | 5 | 0 | |
| 2017-18 | Toronto Maple Leafs (NHL) | 62 | 34 | 29 | 63 | 12 | 7 | 1 | 1 | 2 | 0 | |
| 2018-19 | Toronto Maple Leafs (NHL) | 68 | 37 | 36 | 73 | 12 | 7 | 5 | 1 | 6 | 2 | |
| 2019-20 | Toronto Maple Leafs (NHL) | 70 | 47 | 33 | 80 | 8 | 5 | 2 | 4 | 6 | 0 | |
| 2020-21 | Toronto Maple Leafs (NHL) | 52 | 41 | 25 | 66 | 10 | 7 | 1 | 4 | 5 | 0 | |
| 2021-22 | Toronto Maple Leafs (NHL) | 73 | 60 | 46 | 106 | 18 | 7 | 4 | 5 | 9 | 0 | |
| 2022-23 | Toronto Maple Leafs (NHL) | 74 | 40 | 45 | 85 | 20 | 11 | 5 | 6 | 11 | 7 | |
| 2023-24 | Toronto Maple Leafs (NHL) | 81 | 69 | 38 | 107 | 20 | 5 | 1 | 3 | 4 | 2 |
* Part of USA Hockey's National Team Development Program