It's not his body, it's his camp that is the problem. Overeem is still a world class fighter, he just needs a coach who will tell him to keep his f'ing hands up. Overeem had the fight in the bag and literally handed it to Bigfoot on a silver platter.
Standing in front of a 260 pound man trying to punch you with your hands down and chin up = nap time. Bigfoot is not a can, he isn't good enough to beat Cain but Saturday night was a simple case of a terrible camp filled with yes men telling him he's god. He needs a guy like Greg Jackson to yell at him "you're an idiot, keep your hands up, you are nothing until you win"