Gallagher was tackled headfirst onto the ice by Lightning defenseman Mikhail Sergachev during a scuffle in the third period between the two.
Gallagher started to bleed from the head.
He appeared to be OK after the scrum and was able to skate off of the ice.
Montreal and Tampa Bay had a chippy night, though the Lightning would get the better of the Canadiens and take Game 1, 5-1. The Canadiens beat the Lightning in the hits category, 58-57.
Tampa Bay’s Erik Cernak would start the scoring for the Lightning in the first period. Cernak rushed the net and got the puck past goalie Carey Price. It was Cernak’s first goal of the postseason.
Yanni Gourde put Tampa Bay up two goals in the second period with his sixth.