He is roughly 10 to 15 lbs lighter in the scale but he is also a bit less lean, so it appears he has lost a bit more muscle then actual scale weight.
Also it's very important to understand that USADA has not entirely eliminated PEDs. It has limited them and forced the athletes to cut back and be more careful. I am sure some athletes have completely ceased all prior protocols, but more then likely the advanced and long term user has just scaled back and become smarter.
So when we see an athlete maintain most of what they were prior to USADA, this is more then likely the reason. Things are never black and white.