Well I keep looking at it

Even between 3.50 and 4.02 Or from 52 down to 40 on the time clock, right after Floyd slips Castillos reaching left jab over his right shoulder.. right then (where Floyd is at his busiest in the whole round; he isnt making contact his fist is left hung in air a lot you can see it even on the pause button) but eventually he gets one low jab in to score and that is his busiest moment in the whole round.

I agree Floyd is moving and evasive and Castillo is made to miss a lot too, its a very hard round to score. I dont think there is even a scoring shot for the first 29 seconds in the round, even that very first jab of Floyds that you hear loud, is off the glove as Castillo is even moving backwards and leaves his arm out to check it.

Floyd moves better ill give him that.