Why would you do this... If he started using them later on, he was an idiot. He might've upgraded his draft stock a little at one point, but seriously, he thought they wouldn't find out?
If he started using them at the beginning of his college career, he might aswell have come clean or so, because going to the combine and getting a blood test while having steroids in your blood is forcing you to come clean eventually.
Ofcourse, this could be part of some kind of medical treatment. In that case, ignore my message.