changing positioning in fight
I notice not all but some of the "slicker" fighters such as mayweather changes his stance/hand position thru out the fight to do certain things.
If anyone is a fan they can easily tell when he fights he goes from shoulder roll position and then hands up real high sort of a peeka boo guard. Also he'll switch to a more open guard position. More fighters do this but he's a good example off the top of my head while you see tons of other high level fighters stay in one position the entire fight.
What are the pros/cons to fighting like this?