Why are we talking about sherk? Get this guy in with BJ, at least Penn has the potential to talk just as good smack. Top level boxers have incredible speed, percision and power when thorwing hands, problem is mma gloves and boxing gloves are too different things. Floyd wouldn't be able to defend, stand etc. like he normally does. He can say that top level boxers would ko a grappler, but none of these guys have been taken down before. If you spend your whole life working on how to throw your hands, you'll be an expert at it. MMA fighters have train in several martial arts and kick boxing is usually a more efficent method of training (I find it that way anyway, although boxing can make for a great workout). Try holding your hands up and say that when Sherk shoots on you like a monster. Trust me, when this guy gets slammed on his ass he'll panic. I do see mayweather coming to the ufc once the money gets right, people wouldn't pay to see Mayweather but pay to see this championship boxer talking shit about mma. Funny how Oscar doesn't talk half as much smack or apparently isn't as good but still can outdraw Floyd 10 times out of 10.