At the Nevada State Athletic Commision meetin on Wednesday, the Commission determined that Mario Yamasaki would be the referee in charge of the action when UFC heavyweight champion Randy Couture defends his belt against Brock Lesnar at UFC 91 on Nov. 15 in Las Vegas.Also called to work for the bout were judges Jeff Mullen, Cecil Peoples, and Tony Weeks.The bout marks Couture's return to the Octagon following more than a year mired in legal battles with the promotion. Source: MMA Weekly
