BC's own Jack McBain with a knee on knee hit to Ovechkin, likely putting the NHL's leading goalscorer, and soon to be all time leading goal scorer, out for a month or so (MCL possible).
It didn't look intentional, but he did appropriately eat a heavy Tom Wilson right hand during a fight later in the game, not surprisingly.
This sucks for Caps fans, and fans of the game, who were marveling at Ovechkin's and the team's performance this year.