Former champion Cain Velasquez's bid to recapture his Ultimate Fighting Championship heavyweight belt was postponed Sunday by a back injury.
The UFC announced that contender Stipe Miocic, coming off an impressive 54-second knockout of veteran Andrei Arlovski on Jan. 2, will now fight champion Fabricio Werdum Feb. 6 in the main event of UFC 196 at MGM Grand in Las Vegas.
It has not been determined when Velasquez (13-2) will return. The San Jose-based fighter has missed extended time with knee and shoulder injuries and has fought just won since a successful title defense in October 2013.
He returned in June for a title fight against Werdum in Mexico City but was adversely affected by the high altitude, and Werdum, who trains in Orange County, won by submission.