Ray Sefo is a New Zealand fight promoter and retired kickboxer, boxer, and mixed martial artist of Samoan descent. He was the K-1 World Grand Prix 2000 Runner-up, is a six-time Muay Thai World Champion, and was an eight time K-1 World Grand Prix Finals tournament participant. He is the president of MMA promotion Professional Fighters League. In kickboxing, he defeated world champions Jerome Le Banner, Peter Aerts, Stefan Leko, Mike Bernardo, and Mark Hunt. He is widely considered to be one of the greatest heavyweight kickboxers to have never won the K-1 World Grand Prix.

K-1 World Grand Prix, also known as the K-1 World GP, is an elimination kickboxing tournament that was originally held annually from 1993 by the K-1 organization, under the ownership of the Fighting and Entertainment Group (FEG). Each year, K-1 would hold various 16-men, 8-match grand prix style qualifying tournaments throughout the world to determine which 16 fighters will compete in the main World GP.