Sign up for ESPN+ and watch PFL 4 The Professional Fighters League swings back into gear on Friday at Overtime Elite Arena in Atlanta, where lightweights Clay Collard and Alex Martinez will shoulder the marquee. Collard and Martinez enter their PFL 4 main event with three points each in the current standings at 155 pounds. Collard climbs into the cage with wins in five of his past six bouts. He last appeared on April 20, when he kicked off his 2022 campaign with a unanimous decision from fellow Ultimate Fighting Championship veteran Jeremy Stephens.