Floyd Mayweather took an IV of saline and vitamins that was banned under World Anti-Doping Agency guidelines before his fight with Manny Pacquiao, according to a SB Nation report.

Mayweather was last in action on September 12th at the MGM Grand in Las Vegas. On that night he won a twelve round unanimous decision over Andre Berto.

Mayweather's camp is claiming he was tested prior to and after the IV was used. The Nevada State Athletic Commission and the testing agency, USADA, have sided with Mayweather on the issue.

LAS VEGAS — Floyd Mayweather Jr. insists he did nothing wrong in taking an IV solution to rehydrate after the weigh-in for his fight against Manny Pacquiao. Doping officials on Thursday also ...

Mayweather’s medical team admits the fighter was given two vitamin mixes intravenously to treat dehydration. The liquid vitamin mix itself is not banned by WADA, but the use of an IV is.