An arrest warrant has been issued for a UFC fighter who got in a brawl this weekend with a man he mistook as the brother of an upcoming boxing opponent, according to the New Orleans Police Department. "Diaz was reportedly in town to support a teammate who was participating in the Misfits Boxing 6 event on Friday at Xavier University's Convocation Center. "Diaz was reportedly in town to support a teammate who was participating in the Misfits Boxing 6 event on Friday at Xavier University's Convocation Center