The Professional Fighters League and Rizin Fighting Federation announced a cross-promotional featherweight championship bout headlining Super Rizin 5 on Sept. 10 in Osaka, underscoring a rare title-stakes collaboration. Rizin featherweight champion Rajabali Shaidullaev (19-0) meets A.J. “Mercenary” McKee, with both organizations’ belts on the line at Kyosera Dome Osaka. Event details identify PFL vs. Rizin at Super Rizin 5 as a union of top-tier MMA promotions. Rizin CEO Nobuyuki Sakakibara described the setup as unprecedented due to both titles being contested simultaneously. PFL CEO John Martin emphasized bringing elite fighters together and backing McKee’s bid for dual belts.