Boston Bruins defenseman Torey Krug left Friday's Game 4 against the Tampa Bay Lightning late in the third period and did not return after suffering a lower-body injury.

Despite a crash into the boards in which his ankle took the worst of it, Krug made it to the bench under his own power, but had to be helped to the dressing room.

Krug later left TD Garden wearing a walking boot, according to Sportsnet's Chris Johnston.

Losing the diminutive blue-liner for any amount of time would be a massive blow for the Bruins. He has 12 points in 11 playoff games, including two assists Friday prior to his injury.

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