I say Chavez chin of steel, great defense and always coming forward would beat up Floyd and win by knock out in the round 10 range. Floyd has no chance of hurting Chavez .
It's funny how people say "Castillo was only Chavez' sparring partner" when really Castillo had the better career as far as 135 lbs is concerned, IMO, and was a lot bigger.
130 lbs is a tough one to call, could go either way. 135 lbs is a Chavez victory by decision... he never spent too long there but Chavez at LW was at his peak. Chavez has the perfect style, attributes & skill to be a nightmare for floyd... the 130 lb JCC wasn`t quite as polished as the 135 lb version, thats why I give that fight a 50/50.