A pretty good friend of mine went to maryland. She met/dated a guy that wound up going to the chicago bears. I had the oportunity to talk to this guy a few years ago about all this. And his response was "everyone is on something. Some are just smarter than others. Come on, This is Pro sports dude"
Now, i dont think that EVERY single Pro athlete is juiced up. But i honestly believe its way, way more than people think!