Randy Couture has been down the retirement road before, albeit under much different circumstances. At 47 years of age, he says that, regardless of the chatter from the doubters, his UFC 129 fight against Lyoto Machida is going to be his last. He doesn't want to linger past his prime and have someone else make the retirement decision for him. Get more MMA and UFC news at the World's top MMA News website http://www.mmaweekly.com.