Floyd Mayweather lobbied for years to have USADA drug testing guidelines implemented in the sport of boxing. So it would definitely be a shock if it was found that he cheated.
Mayweather responded to allegations he took an illegal IV injection before facing off with Manny Pacquiao. The pound-for-pound king vehemently denied breaking any rules.
Here's Floyd Mayweather's response to a report saying that he violated anti-doping rules before the Pacquiao fight pic.twitter.com/UHr6LngG38
— HuffPost Sports (@HuffPostSports) September 10, 2015