Karlsson led the NHL with 3-6-9, including a pair of shorthanded goals, in four games as the Pacific Division champion Golden Knights (50-22-7, 107 points) became the first modern-era expansion team from any of the four North American professional sports leagues to start from scratch and finish first in its division (excluding mergers and all-expansion divisions). He posted 1-2-3 in a 4-1 victory over the Colorado Avalanche March 26, becoming the eighth player in NHL history to reach the 40-goal milestone for a club in its inaugural season (and first since Brian Bradley in 1992-93 w/ TBL). Karlsson added one assist in a 3-2 loss to the Arizona Coyotes March 28 before again collecting 1-2-3, including a helper on the overtime winner, in a 4-3 triumph over the St. Louis Blues March 30. He capped the week with 1-1-2, including
, in a 3 2 division-clinching victory against the San Jose Sharks March 31. The 25-year-old Marsta, Sweden, native shares third place in the League with 42 goals in 79 contests this season (42-33-75) after scoring 18 times in his first 183 career NHL games prior to 2017-18 (18-32-50).