Marek "The Punisher" Piotrowski is a Polish retired heavyweight kickboxer and boxer. He is a former ten time kickboxing world champion.

Donald Glen Wilson, nicknamed "The Dragon", is an American martial artist, film actor, and former professional kickboxer. An 11-time world champion who scored 47 knockouts in four decades, he has been called by the STAR System Ratings as "perhaps the greatest kickboxer in American history. He has disposed of more quality competition than anyone we've ever ranked". In 2015, he was inducted into the International Sports Hall of Fame.