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UNDATED (AP) — Anthony Mantha had two points in his Washington debut, Alex Ovechkin scored the 728th goal of his NHL career and the Capitals beat the Philadelphia Flyers 6-1.

The East Division-leading Capitals went 3 for 3 on the power play as part of another offensive outburst. Mantha had a goal and an assist after a trade from Detroit. Ovechkin scored his team-leading 22nd goal of the season. The Capitals have won three in a row. The Flyers lost for the sixth time in eight games.

In other ice action:

— Johnny Gaudreau scored 36 seconds into overtime and the Calgary Flames beat the first-place Toronto Maple Leafs 3-2. Juuso Valimaki and Elias Lindholm also scored for the Flames. Gaudreau and Lindholm each added an assist, and Jacob Markstrom stopped 24 shots. Calgary won its second straight to pull six points behind Montreal for the fourth and final playoff spot in the North Division. Toronto lost for the second straight night.

— Roman Josi had a goal and an assist in Nashville’s three-goal first period as the Predators beat the Tampa Bay Lightning 7-2 for their fifth win in six games. Josi also had an assist in the third.

— Frank Vatrano scored a power-play goal with 1:51 left in overtime to give the Florida Panthers a 3-2 win over the Dallas Stars. Aleksander Barkov and Radko Gudas scored in regulation, and Chris Driedger made 24 saves for the Panthers, who snapped a three-game losing streak. The Stars are seven points out of the division’s last playoff spot with 15 games to play after playing in last season’s Stanley Cup Final.

— Igor Shesterkin made 27 saves in posting his first NHL shutout and the New York Rangers opened a four-game series against the rival New Jersey Devils with a 3-0 victory. Mika Zibanejad and Artemi Panarin scored and Adam Fox had assists on both goals as New York improved to 10-4-3 since March 13. Pavel Buchnevich scored into an empty net with 28 seconds to play for the 20,000th goal in Rangers’ franchise history. Mackenzie Blackwood had 17 saves as the Devils fell to 2-7-2 in their last 11.

— Charlie Coyle and Jake DeBrusk scored in Boston’s only two chances in the shootout and the Bruins, with newcomer Taylor Hall, rebounded for a 3-2 victory over the Buffalo Sabres on Tuesday night. Craig Smith and David Krejci scored in regulation for Boston, which had lost its last two games yet improved to 4-2-1 in its last seven. Jeremy Swayman made 21 saves for the Bruins and stopped Buffalo’s two shootout attempts. Dustin Tokarski made 32 saves for the Sabres.