Most difficuilt first followed by the remaining fights you think Floyd had some sort of difficuilties in . :good
Castillo I Delahoya Emanuel Burton(agustus) After that im not sure although Jesus Chavez gave him a good fight for a quite a few rounds.... Famoso Hernandez also put up a decent match.
Castillo 1 Castillo 2 DLH Judah Augustus He would have mild difficulty with Pacquiao and be in a 50/50 fight with Sergio.
Castillo 1 Castillo 2 Augustus Oscar (won 3 rounds) Judah (won 2 rounds) They all managed to make Floyd put in a little more effort than usual.