Marcos Maidana took a swipe at Floyd Mayweather Jr., more than a week after losing his World Boxing Association welterweight title during their showdown at the MGM Grand in Las Vegas.*****
Floyd Mayweather Jr. is the odds-on favorite to beat Argentina's Marcos Maidana in their big Cinco De Mayo weekend showdown Saturday. But Maidana may be in position to score one of the biggest upsets in boxing history. Here's how he can pull off the unthinkable.
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