Odd and premature sports retirements

RICHMOND, TX - NOVEMBER 23: Lorena Ochoa of Mexico poses with her Player of the Year trophy after the final round of the LPGA Tour Championship presented by Rolex at the Houstonian Golf and Country Club on November 23, 2009 in Richmond, Texas. (Photo by Scott Halleran/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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