Dee Gordon led MLB by a wide margin in infield hits. Also led in bunt hits. That is the reason for the high average. The 5 HRs vs. only 4 before is probably due to having more ABs to hit 5 than total ABs it took to hit 4. I don't think anyone that sees him play would say he has gotten bigger and stronger or hit the ball harder.
He hits more ground balls than anyone in the big leagues.
Maybe the PED's made him faster, but he has always been one of the fastest players. Surely someone knows whether his h-1 times have lowered.
Only thing I can think is just staying healthy and in the line up. Is that something the stuff he took does?
I'm not claiming he didn't do it, I just don't understand why and how he might have "enhanced" anything.