I know how to pass the majority of drug tests, depending on exactly what they are testing for, i'm sure he knows how as well.
Also GH/Slin and other SARMS can easily escape the tests.
There are many new compounds on the market that are not tested for yet, maybe that's what that "secret" phone call was "really" all about?
Either way, he's trying to play this off and everyone with half a brain knows he's jacked full of PEDs.