Steroid use does NOT help you play baseball. Steroid use plus a shitload of exercise and weightlifting might help. I could cycle steroids for a week, and with my deskbound, computer-based job, I wouldn't be any better at baseball.
If you have talent, but no muscles, steroids plus work will help you do a few baseball things better (hitting for distance, stamina)
If you have talent, but no energy, cocaine will perk you up to the point where you can do baseball things you might be too tired to do otherwise.