USADA has been in the center of controversies after recent and past practices were brought up, but the UFC has come out to fully support what they call the 'gold-standard' in testing.
Questions about USADA's credibility have sprung up following a hard hitting piece from SBNation that detailed several somewhat questionable practices throughout the years. In the article titled 'Can Boxing trust USADA?', it also highlighted the way they handled an illegal IV Floyd Mayweather took, where they kept the NAC and Pacquiao's camp in the dark, and retroactively granted an exemption weeks after the match ended.