William Karlsson Career Stats by Season
| 2026 Playoff | 9 | 1 | 4 | 5 | 6 | 4 | 12 | 0 | 0 | 0 | 0 | 9210 | 1842 | |
| 2025-2026 Regular | 14 | 4 | 3 | 7 | -1 | 4 | 30 | 1 | 1 | 0 | 1 | 12723 | 1817 | |
| 2025 Preseason | 2 | 1 | 0 | 1 | -1 | 0 | 6 | 0 | 0 | 0 | 1 | |||
| 2025 Playoff | 11 | 3 | 3 | 6 | 5 | 0 | 17 | 0 | 1 | 1 | 0 | 12259 | 2043 | |
| 2024-2025 Regular | 52 | 9 | 19 | 28 | 15 | 4 | 119 | 0 | 2 | 1 | 4 | 53179 | 1899 |