These individuals on steroids does it enhance their career does it give them a little more strength a little more stamina a little more psychological edge? Absolutely. How do you determine what - what their stats would be without steroids? It's impossible to tell.
Imagine if you had baseball cards that showed all the performance stats for your people: batting averages home runs errors ERAs win/loss records. You could see what they did well and poorly and call on the right people to play the right positions in a very transparent way.