"There's a lot of guys suffering in silence," he says. "It's like when guys come back from war. It's a shame-based deal. It's embarrassing not to be cognitively as sharp as you once were. There are so many guys out there that we need to identify, and find hope for these guys. They don't ask for help. It totally goes against the nature of the sport, which is to be a gladiator and overcome everything."