Sebastiaan "Bas" Rutten is a Dutch-American actor, former mixed martial artist, kickboxer and professional wrestler. As a kickboxer, he fought 16 times, winning the first 14 matches by knockout, 13 in the first round, and losing his final two fights, one of them against Frank Lobman for the European Muay Thai title in 1991, with Rutten losing by KO in the first round. In MMA, he was a UFC Heavyweight Champion and a three-time King of Pancrase world champion. After his loss to Ken Shamrock in 1995, he finished his MMA career on a 22 fight unbeaten streak.

Kickboxing is a full-contact hybrid martial art and boxing type based on punching and kicking. Kickboxing originated in the 1950s to 1970s. The fight takes place in a boxing ring, normally with boxing gloves, mouth guards, shorts, and bare feet to favor the use of kicks. Kickboxing is practiced for self-defense, general fitness, or for competition. Some styles of kickboxing include: Full contact karate, Muay Thai, Japanese kickboxing, Lethwei, Sanda, and Savate.