Noah Dobson scored, and Semyon Varlamov made 40 saves for the Islanders, who lost in regulation for the first time this season (2-1-1).
“I thought, just through the neutral zone, just our puck management, it has to be better,” New York coach Lane Lambert said. “It's two nights in a row now where we're trying. The intentions are good, but unintended consequences come along with that. And when you turn the puck over in the neutral zone, certainly against fast teams, and you know every team in this league is fast, and [can] transition quickly, you find yourself back in your own zone and spending way too much time there. So, we just have to manage the puck better. You just have to do it.”
Skinner gave Buffalo a 1-0 lead at 16:37 of the second period after Mittelstadt forced a turnover along the wall, skated into the slot and sent a pass to Skinner at the bottom of the right face-off circle.
Mattias Samuelsson made it 2-0 at 19:23 when he cut into the slot after receiving a pass by Mittelstadt from behind the net.
“‘Mittsy’ drove to the blue paint there and [brought] them all in and opens up the top for us and gives us room to make plays,” Samuelsson said. “I think throughout the game, putting it behind them, making them turn had something to do with it, and it was a lot for them to handle.”
Dylan Cozens took a cross-crease pass from Rasmus Dahlin at the left of the net to extend it to 3-0 at 2:40 of the third period.