Rios did get caught by a post fight urine test. But the post-fight urine tests done by Commissions like NSAC, is way different form the urine tests done by VADA or USADA. VADA and USADA's urine tests are way more strict, as they test for many substances NSAC and other Commissions do not test for.
Pacquaio, prior to the Rios fight, passed the weak Commission urine tests. With Rios, that was the first time he passed a strict urine tests.
As a side note, NSAC now has a new random drug testing program where they do strict tests just like VADA and USADA. But it's brand new and has only been used for Bradley vs. Marquez so far.
Pacquaio, prior to the Rios fight, passed the weak Commission urine tests. With Rios, that was the first time he passed a strict urine tests.
As a side note, NSAC now has a new random drug testing program where they do strict tests just like VADA and USADA. But it's brand new and has only been used for Bradley vs. Marquez so far.
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