Odd and premature sports retirements

NEWARK, NJ - APRIL 20: Ilya Kovalchuk #17 of the New Jersey Devils skates against the Florida Panthers at the Prudential Center on April 20, 2013 in Newark, New Jersey. The Devils defeated the Panthers 6-2, (Photo by Bruce Bennett/Getty Images) *** Local Caption *** Ilya Kovalchuk

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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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