Should be cut down, or off completely. I think boxers should come into the ring clean shaven...a couple days growth might be worse than a full beard.
Caught the last round and that was my first thought. Besides looking ridiculous it could easily get in Diaz' eye and maybe even be used as padding against a punch. Should never be allowed to fight with that:nono
Really can't handle the Peterson brothers with those stupid grunts...now they have idiotic beards...must be Muslims now. Another notch lower IMO.