Boxing fans have been waiting for years for the sport's two biggest stars to square off in the ring. Unfortunately, even as representatives for Manny Pacquiao and Floyd Mayweather work on a possible deal, time is running out on what would be the most lucrative boxing match in history. Ken Hershman, the new president of HBO Sports, said any fight between Pacquiao and Mayweather has a "sell-by date," The Associated Press reports. Hershman went on to explain that if the two sides cannot agree by later this year or early 2013, the fight would become "less and less relevant." He...
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