Manny Pacquiao/Floyd Mayweather blood testing

[ansuther]

For those of you that are boxing fans, you may have heard of the controversy surrounding Manny Pacquiao's refusal to do blood testing within 7 days of the fight. He will however agree to blood testing immediately after the fight though. His camp has said that they will do random urine and blood throughout the training camp, but no blood is to be drawn within 7 days of the fight. They claim that Pacquiao is superstitious and is worried of the effects of blood being drawn that close to the fight.

I personally am not aware of a proven PED that can be taken for 7 days or less (like I said, he is allowing full testing up to 7 days out, then urine only), is testable only through blood, not urine, and is undetectable immediately after the fight. Are you guys aware of anything that one could take that fits that criteria?
I have heard of lots of different drugs, "the clear" for example, that have a short half life, but can you take it for only 7 days and gain an advantage? Could you cover it up by the end of the fight? I have taken Winstrol /Dbol /Deca /Sust. and I can say for certain there is little if any noticeable effect after only 7 days.

What are your thoughts?

[bicycle]

mayweather is just scared... pacman knockout 2nd round