Michael Jordan has been retired from the NBA for a decade, but he warned at his Hall of Fame induction ceremony in 2009 not to count him out from making one last comeback. "One day you might look up and see me playing the game at 50," Jordan said near the close of his speech, eliciting laughter from the crowd in Springfield, Mass. "Oh, don't laugh. Never say never. Because limits, like fears, are often just an illusion."