Diaz made his presence known at UFC 270 as he sparked what appeared to be a joint in a hilarious moment.
The camera panned to the Stockton fighter before quickly showing boxing legend Mike Tyson.
Diaz was in attendance to support Brandon Moreno, who surrendered his UFC flyweight title to Deiveson Figueiredo in the co-main event of UFC 270.
The Mexican star lost a narrow decision to the Brazilian slugger, with Diaz taking to social media to voice his support for his friend.
"Moreno still the winner," he tweeted following the official verdict.
Diaz, meanwhile, hasn't fought since his defeat to Leon Edwards last June.
He's been linked with a fight against Dustin Poirier, whose called for a showdown on social media.
