For example, both Marquez and Pacquaio passed their drug tests for the fight. But what does that show? It shows they didn't have anything in their system at the time of the fight.

But what does that prove? It's just a simple matter of cycling off at the right time. You can use PEDs in training, gain a lot of muscle and strength, then cycle off. So by the time of the fight, there's nothing in your system.

But what about the 15lbs of muscle you gained from PED usage, as well as the other physical benefits? That's still there. It doesn't disappear overnight.