Floyd Mayweather, Jr. likely has a lot on his mind as he prepares for what could be the final match of his career on Saturday, and now he can add performance-enhancing drug charges to the list.
As part of a larger profile of boxing's drug problem, Thomas Hauser of SB Nation reports that United States Anti-Doping Agency agents found evidence Mayweather received an illegal IV prior to his fight with Manny Pacquiao to help with dehydration. 
Though the details behind the findings are still unclear, if the allegations are true Mayweather would be in violation of World Anti-Doping Agency regulations, which do not allow for fighters to receive IV injections because they could be used to mask other banned substances, such as performance-enhancing drugs.     
Hauser's piece also accuses the USADA of bending a lot of rules for Mayweather. For example, Mayweather doesn't seem subject to true 365-day testing and even has influence over when he is tested.
As of now, an official investigation hasn't been launched and Mayweather Promotions is business as usual. Watch Floyd reflect on his life, decisions and career at the BET Experience Genius Talks, below: