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MELBOURNE, AUSTRALIA - JANUARY 30: Kim Clijsters of Belgium poses with the Daphne Akhurst Trophy after winning the 2011 Women's Australian Open final, at Brighton Beach on January 30, 2011 in Melbourne, Australia. (Photo by Robert Prezioso/Getty Images)

Tennis player Kim Clijsters – Before her planned first retirement in 2007 at the age of 24, she won the U.S. Open in 2005. After a year off (and the birth of a daughter), she returned in 2009, added three more Grand Slam titles and retired again in 2012.

Odd and premature sports retirements

Yahoo Sports

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.