I have no idea whether or not Tiger Woods (or anybody else on Tour, for that matter) used PED's.
But more to the point, I have no idea what Tiger Woods has to do with Dechambeau. There are LOTS of guys on Tour that look like Tiger now; McIlroy, DJ, Koepka, and so on. Tiger's body looks like his parents' bodies, and I don't think seeing somebody who looks like he looks is particularly surprising. Maybe he cheated; maybe he didn't; I could live with it either way. When I was 18 years old, I was 6-2 and weighed 145 lbs; my father weighed well over 200 lbs. By 30, I looked a lot more like him than I did the kid I was in HS, and it didn't have a thing to do with PED's. Doesn't mean Tiger didn't cheat, but the changes in his body over a period of years in his 20's doesn't mean he did, either.
There is NOBODY on Tour that looks like BDC; nobody. To believe that he did this naturally, you have to believe that he was able to do something thru lifting and diet that nobody else can do, and to believe that, you have to believe that he has a work ethic unlike anyone else and a knowledge base unavailable to anyone else. Both of those ideas are laughable.