Erik Karlsson

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Ottawa Senators center Zack Smith (15), Tom Pyatt (10) and Erik Karlsson (65) celebrate after Smith scored against the Florida Panthers in the first period of an NHL hockey game, Sunday, Feb. 26, 2017, in Sunrise, Fla. (AP Photo/Alan Diaz)

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Tampa Bay Lightning right wing Nikita Kucherov (86), of Russia, tries to stick-handle around Ottawa Senators center Kyle Turris (7) and defenseman Erik Karlsson (65), of Sweden, during the second period of an NHL hockey game Thursday, Feb. 2, 2017, in Tampa, Fla. (AP Photo/Chris O'Meara)

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Ottawa Senators' Milan Michalek (9), Erik Karlsson (65) and teammates celebrate Jason Spezza's goal against the New York Islanders in the second period of an NHL hockey game Tuesday, April 8, 2014, in Uniondale, N.Y. (AP Photo/Kathy Kmonicek)

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Ottawa Senators defenceman Erik Karlsson attempts to get the puck past Montreal Canadiens defenseman Francis Bouillon and forward Michael Bournival during second period NHL hockey action in Ottawa on Friday, April 4, 2014. (AP Photo/The Canadian Press, Sean Kilpatrick)

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Dallas Stars center Cody Eakin (20) and Ottawa Senators defenseman Erik Karlsson (65) position themselves in front of goalie Robin Lehner (40) as the puck flies in during the second period an NHL Hockey game Saturday, March 22, 2014, in Dallas. (AP Photo/LM Otero)