The Boston Bruins will be without leading scorer David Pastrnak for at least two weeks after the winger injured his left thumb in an off-ice accident, the team confirmed Tuesday.

The injury occurred Sunday night when Pastrnak slipped and fell after attending a sponsorship dinner with several of his teammates. He underwent surgery on the thumb and will be reevaluated in two weeks.

Pastrnak, 22, has 66 points (31 goals and 35 assists) in 56 games this season. He leads the NHL with 15 power-play goals.

It’s a big loss for the Bruins, who entered Tuesday night’s game against the visiting Chicago Blackhawks in third place in the Atlantic Division. They were one point behind the Toronto Maple Leafs and one point ahead of the Montreal Canadiens in the standings.

Boston general manager Don Sweeney said Tuesday that Pastrnak’s injury will not affect his plans for the upcoming Feb. 25 trade deadline.