Sebastian "Bas" Rutten is a Dutch–American actor, retired mixed martial artist, kickboxer and professional wrestler. He was a UFC Heavyweight Champion, a three-time King of Pancrase world champion, and finished his career on a 22 fight unbeaten streak (21 wins, 1 draw).

From 2007 to 2016, Rutten was the co-host of Inside MMA on AXS TV. Rutten became a naturalized American citizen receiving citizenship in the late 1990s.