Is switching hands effective? Floyd rarely does it. Who's the best at it?

Kell Brook, DeGale, Andre Ward is good at is, I think Dirrell does it as well. Donaire tried fighting an entire fight Southpaw not long ago and looked awful for most of it, he switched back to righty and KO'ed the guy 2 rds later.

Giovani Segura is the best at it today

Cotto was very effective against Quintana from the southpaw stance, after that I wouldn't say he fought out of it, he'd switch once simply to land a straight/ overhand left which was very effective against Margarito, Mosley and if I remember correctly, think he momentarily stunned Pacquiao with it. Though, Cotto would quickly switch back after landing it. Andre Ward, to me, is clearly the best switch hitter right now, he was very effective against Miranda, Kessler, he can actually fight out of the southpaw stance. Dirrell is 2nd, another good switch hitter. All time, from what I've seen (Which probably isn't much) Marvin Hagler.

Interesting, I knew Donaire did it occasionally, but I had no idea Cotto did it. Never heard of that James Degale chap. Donaire always did it before Montiel. I think it was mostly practice Cotto did it all the time actually

Cotto does, Martinez does, DeGale, etc Kell Brook is superb at switch-hitting as are a lot of Ingle fighters.

Interesting, I knew Donaire did it occasionally, but I had no idea Cotto did it. Never heard of that James Degale chap.

when floyd goes southpaw he gets even more defensive. he's not looking to ko you from the southpaw stance. he is ****ing with your timing/rythym and what you think he is gonna do. he will switch back to ortho and land bombs. marvin hagler fought orthodox vs srl for part of the fight idk how long he did it for or why. he should have stayed southpaw and tried to box instead of brawl. point is you shouldnt do it a whole lot but it can be useful to play mind games.

Marvin Hagler was the master of switching hands during fights. He could beat you either way and used it as a tactic to keep the opponent off balance. Most modern fighters don't seem to use it as much since they stick to more well defined styles. Marvin Hagler's style was Marvin Hagler and that was certainly a plus when it comes to mixing it up.

Donaire and Cotto does it James Degale switches every few seconds

Well if you are good at a particular style, stick with it since it is your best weapon. But if you have the talent to switch I think it's a big advantage to confuse your opponent and screw their plans up.