The former two-time UFC heavyweight champion, Mir (17-9, fighting out of Las Vegas, Nev.) is coming off a devastating first-round finish of Antonio “Bigfoot” Silva in Brazil on Feb. 22, and has one of the most feared ground attacks in UFC history. Holding the record for most wins in the UFC heavyweight division (15), Mir’s resume includes victories over some of the world’s best in Minotauro Nogueira, Roy Nelson, Mirko Cro Cop and former UFC heavyweight champion Brock Lesnar. Getting the fight to the ground will be key for Mir in this classic grappler vs. striker matchup as all of Duffee’s wins have come by way of knockout.