Odd and premature sports retirements

��24 Feb 2002: Mario Lemieux #66 of Canada celebrates after defeating the USA 5-2 in the men's ice hockey gold medal game of the Salt Lake City Winter Olympic Games at the E Center in Salt Lake City, Utah. DIGITAL IMAGE. Mandatory Credit: Al Bello/Getty Images

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The Detroit Lions announced Tuesday that WR Calvin Johnson has retired. Johnson, who walks away at age 30, signed a 7-year contract extension in 2012 worth $113.5 million. Here's a look back at some other odd, abrupt or premature retirements by star athletes over the years.

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