Rangers 4, Hurricanes 3 (OT)
It is the third consecutive season the visiting Rangers have reached the post-season.
Derek Stepan matched Callahan with a goal and an assist, Derick Brassard scored for the fourth time in five games and Brad Richards also tallied.
Henrik Lundqvist made 18 saves for the Rangers who eliminated Winnipeg from postseason contention.
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Senators 2, Capitals 1 (OT)
Defenseman Sergei Gonchar scored on a power play 47 seconds into overtime as visiting Ottawa clinched a play-off berth for the third time in four seasons.
Rookie Jakob Silfverberg scored his 10th goal and Craig Anderson made 19 saves for the Senators, who swept Washington in their three-game season series and moved into a tie for sixth place in the Eastern Conference with the New York Rangers and Islanders.
Ottawa have a game in hand on both clubs.
Captain Alex Ovechkin tied the game with his league-leading 32nd goal for the Capitals, who saw their six-game home winning streak come to an end.
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Red Wings 5, Predators 2
Pavel Datsyuk recorded a goal and two assists and Johan Franzen had one of each as hosts Detroit inched closer to locking up a postseason berth by beating Nashville 5-2.
Valtteri Filppula, Patrick Eaves and Justin Abdelkader each added a goal and Jimmy Howard made 20 saves for the Red Wings, who hopped one point over the Minnesota Wild and into seventh place in the Western Conference.
Mike Fisher (hand) returned from a seven-game absence and collected a goal and an assist while Craig Smith tallied and Chris Mason turned aside 33 shots for the Predators.
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Flyers 2, Islanders 1
Oliver Lauridsen scored the winner with 6:31 to play as Philadelphia snapped visiting New York's 11-game point streak with a 2-1 victory.
Danny Briere had a power-play goal and Ilya Bryzgalov made 21 saves as the Flyers won for the fifth time in six games and put a damper on the Islanders' bid to overtake Toronto for the fifth seed in the Eastern Conference.
John Tavares scored the lone goal for New York, which fell into a three-way tie with Ottawa and the New York Rangers for sixth place in the East.
Kevin Poulin, making his fourth start of the season, turned aside 28 shots.
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Devils 3, Penguins 2
Ilya Kovalchuk scored to snap a tie with 6:10 remaining in the third period as hosts New Jersey erased an early two-goal deficit to defeat Eastern Conference-leading Pittsburgh 3-2 for the third time in four outings.
David Clarkson netted his team-leading 15th goal, Travis Zajac also tallied and Patrik Elias notched a pair of assists for the Devils.
Johan Hedberg turned aside 16 shots in his first action since March 19.
Matt Cooke and Jussi Jokinen scored and Marc-Andre Fleury finished with 29 saves for the Penguins, who have dropped two straight after winning 22 of their previous 24 contests.
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Bruins 2, Lightning 0
Tuukka Rask turned aside 30 shots for his fifth shutout of the season and third in April as Boston completed a three-game sweep of visiting Tampa Bay with a 2-0 win.
Defenseman Dennis Seidenberg and Daniel Paille scored goals for the Bruins.
Rask collected his 16th career shutout as Boston stayed tied with Montreal for the Northeast Division lead.
The Bruins held two of the league's top three scorers, Martin St. Louis and Steven Stamkos, to six shots on goal combined and killed three Lightning power plays.
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Maple Leafs 4, Panthers 0
James Reimer made 34 saves and Phil Kessel scored twice to stay red-hot in April as visiting Toronto beat Florida 4-0 for their second win in five games.
Leo Komarov and Clarke MacArthur tallied in the first period for the Maple Leafs.
The Panthers are three points behind the Colorado Avalanche with only one game remaining, ensuring they will finish with the worst record in the league.
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Blues 4, Flames 1
Ryan Reaves had his first career two-goal game as hosts St.
Louis moved into fourth place in the Western Conference with a 4-1 win over Calgary.
Andy McDonald and Alexander Steen also scored and Brian Elliott turned aside 18 shots as the surging Blues improved to 11-3-0 in April and leapfrogged San Jose and Los Angeles in the West standings.
Chris Stewart and Adam Cracknell each had a pair of assists for St. Louis, which can secure the No. 4 seed and home-ice advantage in the first round by beating visiting Chicago on Saturday night.
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Canadiens 4, Jets 2
David Desharnais and Max Pacioretty scored in under a three-minute span during the third period as visiting Montreal kept pace atop the Northeast Division by defeating Winnipeg, which was eliminated from postseason contention earlier in the evening.
Rene Bourque and rookie Brendan Gallagher also tallied and Carey Price turned aside 23 shots for the Canadiens, who won for just the second time in seven outings to remain even with Original Six rival Boston.
The Bruins, who have a game in hand, skated to a 2-0 triumph over Tampa Bay on Thursday.
Blake Wheeler and James Wright scored and Ondrej Pavelec finished with 26 saves for the Jets, who were eliminated after the New York Rangers posted a 4-3 overtime victory over Carolina.
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Blue Jackets 3, Stars 1
Cam Atkinson scored twice and Mark Letestu recorded the go-ahead goal on the power play 7:56 into the third period as visiting Columbus remained alive for a play-off berth by beating Dallas 3-1.
Atkinson scored with 1:40 left in the game for Columbus, which entered the game ranked last in the league on the power play.
The Blue Jackets moved even in points with eighth-place Minnesota, which has two games remaining while Columbus hosts Central Division-rival Nashville on Saturday to end the regular season.
Sergei Bobrovsky made 31 saves and Brandon Dubinsky added two assists for the Blue Jackets, who have won seven of their last eight games.
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Ducks 3, Canucks 1
Matt Beleskey and Brad Staubitz scored second-period goals as visiting Anaheim posted its third consecutive victory despite resting several regulars.
Andrew Cogliano also tallied and Jonas Hiller (28 saves) came within 3:18 of his second shutout of the season for the Pacific Division champion Ducks, who completed a 2-1-0 road trip.
Defenseman Jason Garrison scored and Roberto Luongo turned aside 27 shots for Northwest champion Vancouver, which had its eight-game home winning streak snapped.