Exactly, not to mention other performance enhancers aside from lean mass builders that can benefit a boxer, such as stimulants, painkillers, sedatives and diuretics.
I read an article the other day where this was mentioned They said he consumes 7000 a day (five protein shakes as part of that) He burns 7500 Obviously this is during camp, not every day of his life It struck me immediately that it's a bit too accurate to believe. But then again his athleticism is hard to believe. Pac is a genetic freak so what applies to you and me is different for him. Look at the pics when he was 16-17, he's totally abnormal. No fat on him whatsoever.
I do believe he is a genetic freak, he probably gained his size earlier on during his strength/size phase, maybe even lasting a good number of months in anticipation of the fight, then maintained it. They will be keeping their methods pretty tight I'm sure