i really dont see diaz giving gsp or bj problems to be honest.
i have alot of respect for diaz, gr8 fighter, but.
lets be honest, gsp will take him down, Easily, and avoid submission and ground and pound him out with elbows and knees to the body serra style.
and bj, hrmm mb he does have somewhat a good matchup there, but only in the sense that if he continually brings it maybe bj will tire, but he hasent been tiring of late.
if you have 2 guys who like to slug but 1 being potentially slightly not as good but has more power, i think the power wins in the end. and bj has more power than nick,nick wont submit bj, and bj mb wont submit nick, but he will be the dominant force on the ground
silva i wont even bother goin into cos noway in hell does he beat the spider.