MIAMI - DECEMBER 26: Running back Ricky Williams #34 of the Miami Dolphins breaks away from linebacker DeAndre Levy #54 of the Detroit Lions at Sun Life Stadium on December 26, 2010 in Miami, Florida. The Lions defeated the Dolphins 34-27. (Photo by Marc Serota/Getty Images)
Ravens' Ricky Williams retiring
Former NFL rushing leader Ricky Williams is retiring after 11 seasons, the Baltimore Ravens running back said on Feb. 7.