The guy training Marquez has boasted that he's created twenty undetectable steroids by changing a small part of the chemical structure of existing steroids. With a guy like this who knows what he's doing and works in Mexico where this stuff is legal Marquez could have been juicing for months and not test positive.

The head of the NSAC, Kizer, admits passing their tests is as easy as walking across the road. Vegas don't want to catch anybody, it's bad for business. They especially don't want to start random testing before big fights in case they catch somebody and a multi-million dollar bonanza goes down the toilet.

The recent Thomas Hauser/Montoya articles on PEDs in boxing are very worth reading.