Markstrom was left without his stick on the play after colliding with teammate Bo Horvat.

Also, safety and return specialist Jevon Holland was carted off the field after colliding with teammate Troy Dye.

Pittsburgh LW Conor Sheary also sustained a concussion on Monday after colliding with teammate Patric Hornqvist and has been ruled out of Game 4.

Nik Popovic added 10 points for Boston College before being lost for the game after colliding with teammate Steffon Mitchell, with both entering concussion protocol.