Matias Lassen (born 15 March 1996) is a Danish professional ice hockey player who is a defenceman for the Iserlohn Roosters of the Deutsche Eishockey Liga (DEL).
Lassen made his Swedish Hockey League debut playing with Leksands IF during the 2016âÂÂ17 SHL season.
He played with Malmö Redhawks for 8 seasons, before leaving to sign a one-year contract with German club, Iserlohn Roosters of the DEL, for the 2025âÂÂ26 season on 16 July 2025.