Larsson was drafted in the sixth-round, 167th-overall by the Detroit Red Wings, in the 2016 NHL Entry Draft. He has never played an NHL game and is expected to join Pittsburgh in Sweden to precautionarily serve as the team's third goalie. The 27-year-old Larsson has a 2.92 GAA and .891 SV% in five games (3-0-1) with the Wilkes-Barre/Scranton Penguins (AHL) this season.

Larsson was a sixth-round pick (No.167 overall) in 2016 and finished his first season at the University of Denver, where he went 13-6-3 with a 1.95 GAA, .932 SV% and four shutouts in 22 games.