Sebastian "Bas" Rutten (February 24, 1965 -) is a Dutch mixed martial arts fighter and color commentator. He was a three time King of Pancrase, former Ultimate Fighting Championship Heavyweight Champion, and is a certified MTBN Thai Boxing instructor, Pancrase instructor, a 3rd Degree Black Belt in Kyokushin and a 2nd Degree Black Belt in Tae Kwon Do. He is also the founder of "The Bas Rutten System" and the author of various martial art books and videos. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.