"Steroids don't make people bigger, they merely allow people to work out longer without getting tired"
I lived with a bunch of football players in college who worked out consistently. They were each, what I would consider, average build. However, once they started taking steroids after freshman year, they all got huge and ripped.
Steroids do make you largers. Example: Sammy Sosa and Gee-ombie!! BOTH are much smaller physically now. Look how large Mark McGuire got from his earlier days. Simply eating pizza or hitting the weights did not do that to him.
I have never taken steroids, and I've probably lifted weights 10 times in my entire life, so everything I know about this is what I've read and heard. But my understanding is that if one takes steroids and sits around watching TV all day one will not get any bigger or stronger, and that the advantage afforded by steroids is due to the user's ability to work out many hours a day without getting tired.
We had a local boy who played for a small college football around my area and weighed around 230 his senior year. He was an excellent prospect and got drafted by the pros. He made the team, and within one year after graduation had gained seventy pounds of muscle. I don't know if that can be done naturally. Everyone around here suspected steroids. I'm sure your story and mine are common ones across America.