This fight would go all 3 rounds. Sanchez would rush in like a dumbass, like he did when BJ dropped him in the first 10 seconds of their fight, but Edgar's boxing is light years behind BJ's of course. But it is still very good. While Sanchez has weak boxing because he is an idiot and rushes in wildly. Exciting, sure. Smart, not even close. Edgar wins this fight. Because he would dominate the stand up because he is a good boxer and Sanchez is a dumbass. Diego would probably take him down, but Edgar is good on the ground and Sanchez wouldn't do any damage at all. Sanchez loses to any GOOD, well-rounded lightweight by unanimous decision. Or, if he is lucky and his opponent is drunk or sick, he loses by split decision.