The U.S. Anti-Doping Agency is looking into Stockton fighter Nate Diaz after he used a vape pen in the UFC 202 post-fight press conference, and claimed that the pen had CBD oil, according to several news reports.
Marijuana is only banned “in-competition” for UFC. It’s believed that Diaz was not submitted to a drug test following the press conference.
Diaz lost the fight to Conor McGregor on Saturday.
Several reporters in the media tent noted a smell consistent with marijuana smoke in the outside facility, though the source was unclear, according to the Las Vegas Review Journal.