One of his arms has always been smaller, he talked about this yrs ago.
These pros need to take after Bob Paris. He looks very fit and health but is retired so really doesn't resemble a bodybuilder. Doesn't looks like he is ta"ing any PEDS at all, just lots of hikes with his husband in BC.
If he doesn't want to go to Nasser's road he should get slimer, fit and healthy.