The Bruins are going to be without their top defenseman for the foreseeable future.

Speaking to reporters in Anaheim ahead of Boston’s game against the Ducks on Wednesday night, Bruins head coach Marco Sturm confirmed that McAvoy has undergone surgery after taking a slap shot to the jaw last Saturday in a win over the Canadiens.

There is no timeline for his return, Boston’s bench boss noted.

“Charlie had facial surgery, successfully,” Sturm said. “He’s doing good. He’s recovering right now at home. We still don’t know how long he’s going to be out.”

An extended absence stands as a brutal setback for both the Bruins and McAvoy — who was playing some of the best hockey of his career over the last few weeks before getting stung by the injury bug once again.

McAvoy has been sidelined si

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