The UFC’s commitment to its first event in Mexico hedged in part on the health of its heavyweight champion, Cain Velasquez . The 31-year-old fighter’s shoulder was injured in his most recent title defense this past fall. But with the promotion’s announcement today of a title fight between Velasquez and No. 1 contender Fabricio Werdum following the first Latin American season of “The Ultimate Fighter,” optimism has given way to apparent certainty. UFC 180 heads to Mexico City on Nov. 15 with the heavyweight headliner, UFC President Dana White announced at a press conference in the country’s capital.