Karlsson hasn't played since sustaining a 70-percent tear of the Achilles' tendon in his left leg when he was stepped on by the Pittsburgh Penguins' Matt Cooke during a game Feb. 13.
The 2012 Norris Trophy winner underwent surgery to repair the cut Feb. 14, and was expected to miss 3-4 months. He had 10 points in 14 games at the time of the injury, and was averaging 27:03 of ice time per game.
It's a tribute to him, and everything he's done and deserved is coming to fruition tonight with his jersey in the rafters. He's going to be a first-ballot Hall of Famer. And I said today, if he's not, take my stuff out. If he doesn't deserve to be in there first ballot, no one does. Except for (Wayne) Gretzky, I guess.
— Hockey Hall of Fame member Brett Hull on former teammate Mike Modano, whose No. 9 was retired by the Dallas Stars on Saturday