The following statement was issued by the U.S. Anti-Doping Agency (USADA) on Thursday in response to Thomas Hauser’s recent SB Nation article that questioned the agency’s performance-enhancing drug (PED) testing practices in regard to professional boxing, and Floyd Mayweather Jr. in particular:

Whether due to a genuine misunderstanding of the facts or an intentional desire to mislead, numerous unfounded and false accusations have been leveled against USADA in recent on-line articles. Since our inception, USADA’s sole mission has been to protect clean sport. As such, it is unfortunate and extremely disappointing to have to address articles riddled with significant inaccuracies and misrepresentations based on unsubstantiated rumors as well as anonymous or self-interested sources that have recklessly called our integrity into question. It is simply absurd to suggest that we would ever compromise our integrity for any sport or athlete.

Although the articles in question contain a multitude of errors, all of which will be addressed at the appropriate time, we believe it is important to immediately correct the record regarding the false suggestion that Floyd Mayweather violated the rules by receiving an IV infusion of saline and vitamins.

As was already publicly reported in May of this year by the Nevada State Athletic Commission (NSAC), Mr. Mayweather applied for and was granted a Therapeutic Use Exemption (TUE) by USADA for an IV infusion of saline and vitamins that was administered prior to his May 2 fight against Manny Pacquiao. Mr. Mayweather’s use of the IV was not prohibited under the NSAC rules at that time and would not be a violation of the NSAC rules today. Nonetheless, because Mr. Mayweather was voluntarily taking part in a USADA program, and therefore subject to the rules of the WADA Code, he took the additional step of applying for a TUE after the IV infusion was administered in order remain in compliance with the USADA program. Although Mr. Mayweather’s application was not approved until after his fight with Mr. Pacquiao and all tests results were reported, Mr. Mayweather did disclose the infusion to USADA in advance of the IV being administered to him. Furthermore, once the TUE was granted, the NSAC and Mr. Pacquiao were immediately notified even though the practice is not prohibited under NSAC rules.

Over the past six years USADA has conducted anti-doping programs for over 45 fights in the sport of professional boxing, and each of those programs has been conducted in accordance with the WADA Code and the International Standards. As a result, every athlete who has participated in one of our programs has voluntarily agreed to abide by the rules of the WADA Code and willingly subjected themselves to substantially more stringent testing protocols than they otherwise would have been subject to.

There are certainly those in the sport of professional boxing who appear committed to preventing an independent and comprehensive anti-doping program from being implemented in the sport, and who wish to advance an agenda that fails to put the interests of clean athletes before their own. Despite that opposition, we will continue to demonstrate to the clean athletes we serve, the sport partners we work with, and all those who share the ideal of fair competition, that we remain committed to our mission of protecting the rights of clean athletes and the integrity of competition.

Mayweather also issued a statement on Thursday:

As already confirmed by the USADA Statement, I did not commit any violations of the Nevada or USADA drug testing guidelines. I follow and have always followed the rules of Nevada and USADA, the gold standard of drug testing.

Let’s not forget that I was the one six years ago who insisted on elevating the level of drug testing for all my fights. As a result, there is more drug testing and awareness of its importance in the sport of boxing today than ever before.

I am very proud to be a clean athlete and will continue to champion the cause.