The Ultimate Fighting Championship has set up shop inside Madison Square Garden—“The World’s Most Famous Arena”—a total of seven times since the sport of mixed martial arts was legalized in the state of New York in 2016. It has been an eventful relationship, to say the least. The organization on Saturday returns to the venue with UFC 309, where Rochester native Jon Jones defends his share of the heavyweight title opposite former champion Stipe Miocic in the five-round headliner.