Boston Bruins defenseman Matt Grzelcyk was shaken up and forced to leave the game after a hard hit from behind by St. Louis Blues forward Oskar Sundqvist late in the first period of Game 2 on Wednesday night.

Grzelcyk was helped to the Bruins' dressing room by a trainer and his teammates and didn't return for the start of the second period.

Sundqvist was assessed a two-minute minor, which the Blues killed off.

Grzelcyk has been a steady piece on the Bruins' third defensive pairing this spring, averaging just over 17 minutes per night and chipping in seven points so far in the postseason.

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