I'm not sure if it's considered a steroid but a local high school(my alma mater) football coach encouraged the use of Creatine and many of the players used it. During his tenure as coach(he retired I think) the team won the local weightlifting competitions between all the area schools two or three times.
Creatine isn't a steroid, although I've seen it do some pretty incredible stuff. A person with the right body chemistry can put on a lot of mass by using creatine.