Updated: David Pastrnak out at least two weeks after procedure on left thumb

A Bruins club that has labored all season in long when it comes to generating offense is now set to be without its top scorer for at least the next two weeks.

Addressing the media at Warrior Ice Arena Tuesday morning, Bruins general manager Don Sweeney announced David Pastrnak underwent a procedure on his left thumb — with the star winger set to be re-evaluated two weeks from now. Sweeney added that the surgery was a success, and the club expects him to return this season.

“It was a tendon repair,” Sweeney said. “They’ll have the specifics later, but (Dr. Matt Liebman) feels comfortable in saying in two weeks, he’ll have a much better timeline in terms of what it’s going to take. From a rehab standpoint, there’s really nothing. He’ll be able to skate in 10 days, so conditioning really won’t be an issue. Just a matter of the stitches and infection-wise, to make sure he doesn't have any issues in that regard.”

Pastrnak, who paces Boston in both goals (31) and points (66) this season, suffered the injury while attending a sponsorship dinner on Sunday night. At around 11:30 p.m. that night, he fell — causing the injury.

“I met with David yesterday, he was extremely upset, disappointed," Sweeney said. "Obviously feels like he let everybody down, despite it being an accident. Was apologetic and was heartfelt in trying to explain that accidents happen, and I said the same thing to him.”

With Pastrnak sidelined, the Bruins kept its new top line intact during Tuesday’s morning rushes ahead of a matchup with the Chicago Blackhawks later that night — with Danton Heinen remaining up top with Patrice Bergeron and Brad Marchand.

Pastrnak’s latest spot in the lineup, to the right of David Krejci on Boston’s second line, was filled in by Peter Cehlarik, while Jake DeBrusk returned to his usual top-six role at left wing.

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