Did Floyd Mayweather Jr. have an unfair advantage in his May megabout with Manny Pacquiao?

According to an SB Nation Report, Mayweather took an intravenous injection of saline and vitamins, that's banned under World Anti-Doping Agency guidelines, the night before his May 2 fight with Pacquiao. The same report states that although the substances in the IV are not illegal by WADA's terms, their method of being given intravenously wasn't allowed and goes against the rules.

Still, Mayweather received an exemption from the United States Anti-Doping Agency three weeks after the fight, which Mayweather won by unanimous decision. That being said, Nevada State Athletic Commission executive director Bob Bennett told SB Nation that USADA does not have the power to grant an exemption, stating that only the Athletic Commission can do so.

The news hit on the same Wednesday that Mayweather held the final press conference for his fight against Andre Berto at the MGM Grand Arena in Las Vegas on Saturday night. The undefeated boxing champion insists this will be the 49th and final fight of his career.

Ironically, Mayweather had repeatedly accused Pacquiao of taking PEDs (performance-enhancing drgus) in 2009, a claim that caused Pacman to sue his rival with the two eventually settling on an undisclosed seven-figure sum. That was just one of the reasons that the Mayweather-Pacquiao fight was delayed for several years, before finally taking place this past May.

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