Maskings agents used.. can be detected via the urine test. for example, chavez JR was caught using diurectics(a masking agent) .
No fan knows what Mayweather is or isn't on. Come March 13th, it won't matter what he's on though.
:huh Hes never tested positive for peds. If what you say is true, then all boxers should get an asterick next to their name. They're ALL suspect...