UNDATED  - The Pittsburgh Penguins didn't need team captain and leading scorer Sidney Crosby in Game 1 of the NHL's Eastern Conference quarterfinals.

Pascal Dupuis scored twice and three players had two assists as the Pens forged a 5-0 win over the New York Islanders. Kris Letang and Dupuis scored 32 seconds apart to chase Evgeni Nabokov and put Pittsburgh ahead 4-0.

Beau Bennett put the Penguins ahead to stay just 3:30 into the game. Tanner Glass also scored to support Marc-Andre Fleury, who stopped 26 shots in his sixth career playoff shutout.

Evgeni Malkin, Jarome Iginla and Jussi Jokinen each set up two goals as the Penguins spoiled the Islanders' first playoff game in six years.

Game 2 is Friday in Pittsburgh, and there's still doubt as to Crosby's availability. He hasn't been cleared to play after suffering a broken jaw against the Isles on March 30.

Boston also won its Stanley Cup opener, spotting Toronto a 1-0 lead before beating the Maple Leafs 4-1. Nathan Horton scored the go-ahead goal on a power play with 12 seconds left in the first period. Wade Redden and David Krejci each had a goal and an assist for the Bruins, who scored more than three times for the first time in 10 games.

Game 2 is scheduled for Saturday in Boston, where the Bruins have won six straight against the Maple Leafs.

Vancouver became the first home team to lose a playoff game, allowing two goals in the third period of a 3-1 loss to San Jose. Dan Boyle snapped a 1-1 tie with 10:43 remaining before Patrick Marleau made it a two-goal game about four minutes later.

Boyle and Logan Couture each finished with a goal and an assist.

Antti Niemi stopped 29 shots while outplaying Roberto Luongo, who received the Canucks' starting assignment over Cory Schneider.

Vancouver will host Game 2 on Friday.

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