If he starts training now. And doesn't fight Mayweather. In five years, he has a legitimate shot at being something big in the UFC, or WEC more likely considering his current bulk. Though with 5 years of extensive grappling training he could build a lot of muscle and make LW. Its a possibility, but its not very probable.
Sig courtesy of that photo-matic magician limba
I went out the way that I fight. I went out on my shield. That’s it. Done. --Chuck Liddell
My goal is to end my opponent --Carlos Condit