The Chicago Blackhawks are shutting down defensemen Calvin de Haan and Brent Seabrook for the season with both set to undergo surgery on Friday, the team announced Thursday.
De Haan suffered a right shoulder injury Dec. 10 against the Vegas Golden Knights and has not played since. He underwent offseason surgery on the same shoulder.
De Haan was acquired from Carolina in June, along with forward Aleksi Saarela, for defenseman Gustav Forsling and goalie Anton Forsberg. De Haan was supposed to shore up a defensive unit that was the Achilles heel of the team last season.