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Thomas Greiss

Islanders finish off Penguins 3-1 for stunning playoff sweep

Barry Trotz had questions when he took over the New York Islanders last summer. About the defense. About the goaltending. About where the scoring would come from if star John Tavares bailed in free agency.

One by one over the last 10 months, the Islanders have answered them all. The team that couldn't stop anyone a year ago is now the team that stops nearly everyone — Sidney Crosby and the Pittsburgh Penguins included.

Four games. Four wins, each one more impressive than the next, culminating in a typically gritty 3-1 victory in Game 4 on Tuesday night that finished off a stunning sweep of the Penguins and sent the Islanders into the second round of the playoffs for just...