John Carlson

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Buffalo Sabres right wing Drew Stafford (21) celebrates his goal with teammate Marcus Foligno (82) as Washington Capitals defenseman John Carlson (74) looks on during the first period, Tuesday, March 27, 2012, in Washington. (AP Photo/Nick Wass)

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Washington Capitals' Alexander Semin (28) celebrates his goal with teammates Jason Chimera (25), John Carlson (74), Karl Alzner (27) and Mathieu Perreault (85) in the first period of an NHL hockey game against the Boston Bruins in Boston, Saturday, March 10, 2012. (AP Photo/Michael Dwyer)

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**FILE** Washington Capitals defenseman John Carlson (The Washington Times)

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Philadelphia Flyers right wing Jaromir Jagr (68), of the Czech Republic, gets tripped up by Washington Capitals defenseman John Carlson (74) during the second period of an NHL hockey game, Tuesday, Dec. 13, 2011, in Washington. (AP Photo/Nick Wass)

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Washington Capitals defenseman John Carlson (74) shoves Pittsburgh Penguins left wing James Neal during the second period of an hockey game, Thursday, Dec. 1, 2011, in Washington. (AP Photo/Nick Wass)

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Washington Capitals defenseman John Carlson has been a key member of the improved penalty kill under coach Dale Hunter. (AP Photo/The Canadian Press, Fred Chartrand)

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Washington Capitals defenseman John Carlson (74) pushes St. Louis Blues defenseman Ian Cole (23) during the third period as the Washington Capitals take on the St. Louis Blues, Washington, DC, November 29, 2011. (Andrew Harnik/The Washington Times)

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Washington Capitals' John Carlson, Alex Ovechkin and Marcus Johansson react as Toronto Maple Leafs' David Steckel celebrates scoring his team's seventh goal during third period in Toronto on Saturday Nov. 19, 2011. The Caps lost 7-1. (AP Photo/The Canadian Press, Chris Young)

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Tampa Bay Lightning's Ryan Malone (6) scores past Washington Capitals' John Carlson (74) and goalie Michal Neuvirth (30), of the Czech Republic, during the third period in Game 3 of an NHL hockey Stanley Cup playoff Eastern Conference semifinal series in Tampa, Fla., Tuesday, May 3, 2011. Tampa Bay won 4-3. (AP Photo/John Raoux)

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Associated press Capitals defenseman John Carlson grimaces as he battles for the puck with Lightning right wing Martin St. Louis during the second period. Tampa Bay edged Washington 4-3 for a commanding 3-0 lead in their series.

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DREW ANGERER/THE WASHINGTON TIMES Capitals rookie defenseman John Carlson (left) departed early with an undisclosed injury in Game 1 against Tampa Bay on Friday, but he was back in action for Game 2 of the Eastern Conference semifinal series.

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John Carlson

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Washington Capitals' Mike Knuble (22) celebrates with teammates John Carlson, right, and Alex Ovechkin (8), of Russia, after scoring a goal against the Buffalo Sabres during the first period of an NHL hockey game Saturday, April 2, 2001, in Washington. The Capitals won 5-4 in overtime.(AP Photo/Luis M. Alvarez)

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Washington Capitals' Mike Knuble (22) celebrates with teammates John Carlson, right, and Alex Ovechkin (8), of Russia, after scoring a goal against the Buffalo Sabres during the first period of an NHL hockey game Saturday, April 2, 2001, in Washington. The Capitals won 5-4 in overtime.(AP Photo/Luis M. Alvarez)

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Washington Capitals players and fans celebrate the team's first goal by John Carlson against the New Jersey Devils during the first period of an NHL hockey game in Washington on Saturday, Oct. 9, 2010. (AP Photo)