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NHL top defenceman Karlsson out indefinitely

Erik Karlsson of the Ottawa Senators reacts after being called for a two-minute penalty, on February 1, 2013. The reigning Norris Trophy winner is out indefinitely and will need surgery after suffering a cut to his left Achilles tendon.Reigning Norris Trophy winner Erik Karlsson is out indefinitely and will need surgery after suffering a cut to his left Achilles tendon. Karlsson, who won the Norris Trophy as the NHL's top defenceman last season, was injured in the second period of the Ottawa Senators' 4-2 loss to the Pittsburgh Penguins on Wednesday.