Bas Rutten is a retired MMA fighter and former UFC Heavyweight Champion. He currently is the co-host of Inside MMA, and hosts a podcast with Mauro Ranallo called "Rutten and Ranallo."Bas Rutten is a retired MMA fighter and former UFC Heavyweight Champion. He currently is the co-host of Inside MMA, and hosts a podcast with Mauro Ranallo called "Rutten and Ranallo."Bas Rutten is a retired MMA fighter and former UFC Heavyweight Champion. He currently is the co-host of Inside MMA, and hosts a podcast with Mauro Ranallo called "Rutten and Ranallo."