Also, Manny doesn't react well to blood being taken. Some people have real issues with having blood drawn, not having to do with the sight of blood but some biological thing. My father for example served in combat in Vietnam, has no problem with the sight of blood, he's what I'd describe as a pretty tough guy, but when he goes to the doctor for a blood test, he nearly passes out every time.
Manny said he's fine with blood being taken at the press conference and right after the fight, and also giving urine samples directly before and after the fight. The only stipulation he won't agree to is having his blood drawn the day of the fight itself (remember, he's giving a urine sample that day). If you listen to Mayweather and people in his camp they'll have you thinking it a big cover-up and it's simply not.
If you put an asterisk next to Manny's name, then you have to do it to every fighter that has came before him, because they took the same (or lesser) tests before fights.