Mathew Barzal scored the tie-breaking goal with 6:57 left in the third period Saturday night for the New York Islanders, who beat the Boston Bruins 4-1 in Game 4 of an East Division second-round series in Uniondale, N.Y.
The Islanders evened the best-of-seven series at two games apiece, with Game 5 scheduled for Monday night in Boston.
A shot by Scott Mayfield bounced near the crease and to Barzal, who batted the puck out of the air and past Tuukka Rask.
Casey Cizikas added an empty-netter with 1:03 left, about 10 seconds after Rask bolted off the ice.