100% the refs fault. the fight was ongoing and therefore made the hit legal. if the ref didnt want it to happen he shouldve sent them to neutral corners or stood between. instead he allowed the fight to continue. BUT.....
if floyd wants everyone to think of him as the greatest of all-time he shouldn't have had to sink to that level. he was completely outclassing ortiz and would've taken him out anyways. while it was a legal move it was a dirty move but after the headbutt by ortiz i feel sorry for no one in this matter.
and i shouldn't even have to say it cause i'm sure everyone is thinking it but mayweather vs pac-man needs to happen now more than ever!!