Sign up for ESPN+ and watch PFL 4 The second leg of the Professional Fighters League season kicks off on Friday with elevated stakes—namely, playoff positions and seeding—for the lightweights and light heavyweights on the card. PFL 4 will take place at Overtime Elite Arena in Atlanta, topped by a 155-pound clash between Clay Collard and Alex Martinez. Meanwhile, defending light heavyweight champion Antonio Carlos Jr. squares off against Bruce Souto in the co-feature. The main card airs on ESPN and ESPN+ at 10 p.