The two men are facing punishment from the Nevada Athletic Commission for their roles in the bottle-throwing mess at Wednesday's UFC 202 pre-fight press conference, UFC president Dana White told TMZ on Thursday.
McGregor and Diaz won't be fined or suspended by the UFC, according to senior vice president of public relations Dave Sholler. Instead, the UFC will defer to the Nevada Athletic Commission (NAC), the regulatory body sanctioning the bout.
"They're both getting punished," White said. "I mean, what everybody has gotta understand is we're overseen by the Nevada State Athletic Commission. I guarantee you both of these guys are gonna get massive fines and there's probably going to be a hearing, too, after the fight. There could be suspensions, community service. It's gonna be ugly."
NAC executive director Bob Bennett told MMA Fighting on Thursday that the commission is reviewing the incident on video and the matter could be brought up at the NAC meeting in September. Bennett said if McGregor and Diaz are found to have broke commission rules, they could be sanctioned.
"If the fighters are in violation of NAC 467, we will take appropriate actions in accordance with our regulations," Bennett said in a statement.
NAC statute 467.885 says a fighter can be suspended or have their licensed revoked if he or she "is engaged in any activity or practice that is detrimental to the best interests of unarmed combat." NAC statute 467.886 says: "A person licensed by the Commission shall not engage in any activity that will bring disrepute to unarmed combat, including, but not limited to, associating with any person or entity if such an association brings disrepute to unarmed combat."
White said someone was injured during the wild scene and a lawsuit is in the works as well. There was nothing pre-meditated about it, he added.
"It was 100 percent real," White said. "If you're gonna come up with something staged, throwing cans and bottles in a public place is probably one of the dumbest things. It's gonna cost them both a lot of money, a lot of headache and hassle. They're both in big trouble."
McGregor came to the press conference late and then Diaz and his team left the press conference early, flipping McGregor the bird on the way out. McGregor's team was near the door to the Copperfield Theatre at MGM Grand and the two sides began chucking water bottles, coffee cups and other things at each other. Then, McGregor on stage started launching water bottles and cans of Monster Energy toward Diaz's team.
Both entourages have been banned from the rest of the UFC events this week, per Sholler. Only licensed corner people will be allowed to be around McGregor and Diaz.
Diaz and McGregor meet for a second time Saturday in the UFC 202 main event at T-Mobile Arena. Diaz won the first fight in March via second-round submission. It was McGregor's first UFC loss.