He's too old. He's just another former athlete who thinks he can fight. He probably needs money. By now, you've heard all kinds of reasons why Herschel Walker's upcoming MMA debut is a terrible idea. Well, he has, too -- and for every messageboard rant about the 47-year-old former Heisman winner's Jan. 30 MMA fight on Showtime, he'd like a chance to respond. We gave him that chance.