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SAN FRANCISCO - OCTOBER 07: Inside linebacker Ray Lewis #52 of the Baltimore Ravens celebrates a defensive stop against the San Francisco 49ers at Monster Park on October 7, 2007 in San Francisco, California. Baltimore won the game 9-7. (Photo by Allen Kee/Getty Images)

Ravens star linebacker Ray Lewis to retire

Ray Lewis, who hasn't played since October because of a torn right triceps, announced he will retire after 17 seasons to spend more time with his sons. The fearsome 13-time Pro Bowl linebacker symbolizes the NFL – not just the Ravens, says Yahoo! Sports' Jason Cole, and is well known for his explosive personality.