Call me pessimistic but I think all of them are doing it to one degree or another.
If you asked rookies in any sport if they would jeopardize their future health for fame and fortune today, 9 out of 10 would probably say yes.
I also believe that once all sports reduce themselves to the level of pro wrestling, leagues and competitions would naturally develop for competitors who preform Au natural. The slide began when the Olympics opened the doors to pros. I'd like to see a return to amateur Olympics, but the unionization of college athletes is about to shut down that idea forever.