By Ryan Burton
Golden Boy Promotions is starting to finalize the HBO pay-per-view undercard to the Juan Manuel Marquez- Juan Diaz rematch, scheduled for July 31 at the Mandalay Bay in Las Vegas, Nevada. Earlier today, BoxingScene.com's Ernest Gabion reported the addition of Joan Guzman vs. Joel Casamayor, who battle in a junior welterweight contest. Former junior middleweight champion and "Contender" season one winner, Sergio "The Latin Snake" Mora, has been confirmed to see action on the card as well. Mora's opponent has yet be determined.
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