Top 15 KOs in boxing history

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6. Rocky Marciano TKO13 Jersey Joe Walcott, Sept. 23, 1952 – This fight marked the start of Marciano's reign as heavyweight champion. He was far behind on points, but caught Walcott on the chin with a right cross that led to one of the great boxing photos of all-time. The photo showed the punch at the moment of impact, with Walcott's face grotesquely contorted. (Photo credit: Getty)

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On the heels of one of the most devastating knockouts in boxing history, Yahoo! Sports analyst Kevin Iole gives his top 15 KOs of all-time. Where does Juan Manuel Marquez's knockout of Manny Pacquiao rank in history?

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