The rubber match between current UFC Heavyweight Champion Cain Velasquez and challenger Junior Dos Santos will headline UFC 166. Velasquez won the second bout between the two at UFC 155, regaining the championship via unanimous decision. Dos Santos won the inaugural battle between the two big men at UFC On Fox I, he captured the gold via first round knockout. UFC 166 takes place this October from a location to be announced in Houston, Texas with the aforementioned fighters headlining.