Michael Musumeci Jr. (born July 7, 1996) is an American submission grappler and Brazilian Jiu-Jitsu black belt competitor currently signed to UFC Brazilian Jiu-Jitsu (UFC BJJ), where he is the inaugural and current UFC BJJ Bantamweight Champion. A four-time World Champion and Pan American Champion in colored belts, Musumeci is a five-time IBJJF black belt World Champion (four times in Gi and once in No-Gi), and the first American to win more than one IBJJF World title at black belt. He formerly competed in ONE Championship where he was the inaugural Flyweight Submission Grappling World Champion.