Mosley needs to go straight at him, the problem is he needs and effective and efficient way to do it. He needs to know what to do, for example, head movement, feints, straight right to the body followed by a quick left to the body to set up a big right hand upstairs. The first two don't even need to be too hard, just fast enough to get Floyd to react. I'm not saying that's the way to go, I'm just saying Nazim will have to figure out how Mosley needs to approach Floyd and how to pressure him, when to back off and keep Floyd thinking and uncomfortable.
Well, it's unfair not to credit Castillo for a great perfomance, but Floyd wasn't healthy that night. I think he was having problems with his shoulder or something. But Castillo pressured Floyd extremely well, he got hit, especially early in the fight, but he got through a lot of shots by not giving Floyd the space he wanted that night. From what I remember he was cutting off the ring very well, moving his head and mixing his attack to the body and head.
Mosely has 5 rounds to apply extreme pressure and must avoid reset . . with a good chin, stick and AIM FOR THE SHOULDER