UFC 309: Jones vs. Miocic takes place on Saturday at Madison Square Garden in New York City. Heavyweight champion Jon Jones puts his title on the line for the first time against former two-time titleholder Stipe Miocic in the fight card’s main event. In the co-main event, former lightweight champion  Charles Oliveira and  Michael Chandler rematch.  The ceremonial weigh-in begins at 5 p.m