What type of steroids or HGH have the professional athletes been using?

So far i have not heard that these HGH are or have been illegal, but i do know that they come into considering a players "ability" to achieve their athletic status….so what have they been using? Remember they have not been tried for anything. Roger Clemens was in court today and the only thing he was "threatened" with was…a charge of perjury….not for having an illegal substance… I’m just wondering