Mark Hunt is a New Zealand former professional mixed martial artist and kickboxer. Hunt competed in the Ultimate Fighting Championship (UFC) until 2018 and was the winner of the 2001 K-1 World Grand Prix. He is known as "King of Walk-Offs" due to his popularization of walking away and stopping attacks before the referee officially ends the match.
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.
Peter Aerts is a Dutch semi-retired kickboxer. Known for his devastating high kicks, which earned him the nickname "The Dutch Lumberjack", he is widely considered to be one of the greatest heavyweight kickboxers of all time.
Sem "Semmy" Schilt is a Dutch actor and former kickboxer, Ashihara karateka and mixed martial artist. He stands 212 cm and weighs 171 kg. Schilt holds the distinction of being the only kickboxer to have won 5 major heavyweight tournaments, being a four-time K-1 World Grand Prix Champion and one time Glory Heavyweight Grand Slam Champion. He also held the K-1 Super Heavyweight Championship and the Glory Heavyweight Championship titles. He is the only fighter in K-1 history to win the world championship three times in a row, and also shares the record with Ernesto Hoost for most Grands Prix won, with four.
K-1 World Grand Prix 2000 Final was a kickboxing event promoted by the K-1 organization. It was the eighth K-1 Grand Prix final, involving eight of the world's top fighters, with all bouts fought under K-1 Rules (100 kg/156-220 lbs). The eight finalists were a mixture of invitees, some of whom had been at the previous year's final, or had qualified via preliminary tournaments.
K-1 World Grand Prix 2002 Final was a kickboxing event promoted by the K-1. The event was held at the Tokyo Dome in Tokyo, Japan on Saturday, December 7, 2002 in front of 74,500 spectators. It was the tenth K-1 World Grand Prix final, involving ten of the world's top fighters, with all bouts fought under K-1 Rules (100 kg/156-220 lbs). The eight finalists had almost all qualified via preliminary events, while two additional fighters were invited as reserve fighters. In total there were ten fighters at the event, representing eight countries.
Cyril Abidi, nicknamed "The Marseille Bad Boy", is a French former heavyweight kickboxer and mixed martial artist. A professional competitor from 1998 until 2007, he is perhaps best remembered for his upset first-round knockout win over Peter Aerts, which he followed up with another win in the rematch a month later. Abidi also defeated K-1 standouts Ray Sefo and Petar Majstorovic.
Jason "Psycho" Suttie is a Samoan-born New Zealand former heavyweight kickboxer and 6 time Muay Thai World champion fighting out of Elite Thai Kickboxing Gym in Auckland, New Zealand.
Björn Heinrich Walter Bregy is a Swiss heavyweight kickboxer, European Yoseikan Budo champion and K-1 Europe 2006 in Amsterdam tournament Champion. He holds notable wins over Gokhan Saki, Ray Sefo, Alexander Ustinov, Freddy Kemayo (twice), and Alexey Ignashov.
Douglas Ma'afu Hawke, better known as Doug "Vicious" Viney is a Tongan-New Zealander heavyweight boxer and kickboxer. He is the K-1 World GP 2007 in Las Vegas champion, who also represented Tonga as a super heavyweight boxer under the name of Ma'afu Hawke at 2004 Summer Olympics in Athens, Greece.
Vitor Miranda is a Brazilian former kickboxer and mixed martial artist. He was the K-1 Brazil 2005 and K-1 Turkey 2007 super heavyweight tournament champion.
Eduardo "Morpheus" Maiorino was a Brazilian professional kickboxer and mixed martial artist. He was a three time Brazilian Heavyweight Muay Thai Champion, the K-1 Brazil 2004 Tournament finalist and champion, and a World Muay Thai Association (WMA) Super Heavyweight World Champion.
Richard P. "Rick" Cheek is an American kickboxer and mixed martial artist who competes in the heavyweight division. A North American Muay Thai champion as an amateur, Cheek turned professional in 2005 and debuted in K-1 the same year. He holds notable wins over WSOF standout Dave Huckaba in MMA, 2001 K-1 Japan Grand Prix Champion Nicholas Pettas and multiple time world kickboxing champion Mike Sheppard.
Kim Min-soo is a South Korean former judoka, professional mixed martial artist and K-1 kickboxer. He is best known for becoming a K-1 World Grand Prix 2006 in Seoul finalist and also winning a Silver Medal in Judo at the 1996 Summer Olympics in Atlanta. He is also known for his fights with WWE professional wrestler and UFC heavyweight champion Brock Lesnar, WWE wrestler and K-1 fighter Sean O'Haire, and NFL player turned kickboxer and New Japan Pro-Wrestling contender Bob Sapp. Min-soo holds a notable kickboxing win over Muay Thai world champion Mourad Bouzidi. He announced his retirement from contact sports in 2011, with subsequent stints as color commentator for Japanese and Korean mixed martial arts and professional wrestling events. Kim is also the head judo coach for the Korean Top Team.
K-1 World MAX 2004 World Tournament Final was a kickboxing and martial arts event promoted by the K-1 organization. It was the third K-1 MAX final for middleweight kickboxers involving eight finalists and two reserve fighters, with all bouts fought under K-1 rules. Seven of the eight finalists had won elimination fights at the K-1 World MAX 2004 World Tournament Open, while the last finalist and both reserve fighters were invited despite suffering defeats. As well as tournament matches there was also an opening fight, fought under K-1 rules and a super fight fought under K-1 mixed rules. In total there were fourteen fighters at the event, representing nine countries.
Konstantin Gluhov is a Latvian heavyweight kickboxer and mixed martial artist of Russian descent. He is a former WPKA World Muaythai champion, currently competing in K-1. He made his K-1 debut in 2006 at K-1 Fighting Network Riga 2006 against Denis Sobolyev.
Reuben de Jong is a New Zealand heavyweight kickboxer, mixed martial artist, strongman and professional wrestler of Dutch descent. He is a two-time professional strongman champion of New Zealand and competed in the K-1 Kings of Oceania in 2006 and 2007. De Jong is the holder of two national records in the farmer's walk and stone lifting, and the Guinness World Record for running through the most panes of glass in under one minute. He was signed with WWE under the name of Russell Walker in 2011, but was released the same year.
Jean-Claude Leuyer, or simply Jean Claude, is an American former heavyweight kickboxer. He was a six-time world champion, holding titles in four different organizations, and competing in sixteen world title fights. He holds notable wins over Rob Kaman and Tomasz Kucharzewski in K-1.
Mauricio "Baboo" Da Silva is a Brazilian kyokushin kaikan full contact karate practitioner and former professional kickboxer and mixed martial artist. He is a professional coach and trainer of K-1 and MMA, who has trained a number of world class fighters including Francisco Filho, Glaube Feitosa, Andrews Nakahara, Ewerton Teixeira, Ray Sefo, Aleksandr Pitchkounov, Takumi Sato, Jan Soukup, Kou Tasei, Jan Nortje, Doug Viney, Mighty Mo (kickboxer) and Akebono Taro. From 1998 to 2004 he worked as the trainer and sparring partner for Francisco Filho. He lived in Tokyo, Japan from 2005 to December 2010 and trained fighters from the IKO1 Kyokushin - Team Ichigeki and other fighters from visiting teams at the Ichigeki Plaza. He fought in the K-1 PREMIUM 2003 Dynamite!! and also in the Ichigeki events in Japan.
Jerrel Venetiaan is a retired Dutch kickboxer and mixed martial artist who fought in K-1. As a MMA fighter he fought in Pride Fighting Championships.
Paul Slowinski 
Jay Hepi
Ricardo Van Den Bos 
Peter Graham 
Jorgen Kruth 
Ivica Perkovic
Evgeny Orlov
Mike Bernardo 