There is no link of any kind between Ariza and PEDs. Don't peddle rumours spread by keyboard warriors. The only "link" to PEDs and Ariza is that Pacquiao snorted at Mayweather's initial demand for stringent testing attached to baseless accusations from team Mayweather.
Ariza is only famous because of Pacquiao, and has never been implicated in a PED scandal - unlike the "nutritionists" hired by Berto and Juan Manuel Marquez.
Not that I'm a particular fan of Ariza, but if you can show me why you think he juices his clients? So far it has come down to whim.
I actually quite like Ariza, but both he and Roach have been involved in past dodgy fights of Chavez jnr and so should both know what is going on.
Personally if Chavez ever got found out for testing positive, Roach should be removed from the HOF imo. Any fighter that has ever been banned for failing tests and any awarded trainers should not be allowed to sit amongst the finest in the sport who never cheated or maybe now I should say, never got caught.