Stockton fighter Nate Diaz investigated for vaping at post-fight news conference

Nate Diaz attends the UFC 202 news conference at the MGM Grand hotel-casino on Wednesday, Aug. 17, 2016, in Las Vegas. Conor McGregor showed up about 30 minutes late Wednesday to his news conference with Diaz to promote Saturday night's main event at T-Mobile Arena. So Diaz started without him. Erik Verduzco AP

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.

This story was originally published August 24, 2016 at 10:05 AM with the headline "Stockton fighter Nate Diaz investigated for vaping at post-fight news conference."

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