Being young elevated T levels could have been explained away as Puberty/Adolescence etc. So too could the ~incremental increases in performance/ size etc. So Physio would have no idea, same as Doctor and Trainer may think we have a genetic freak. So it's not unreasonable that no-one noticed. YES he could have done this by himself very easily. Hell 25+ years ago my Relative was 15 years of age and full of Juice, approachedby a CLUB and wanting to sign him. He said sorry, i would be front page news before the end of the year and not for the reasons you want.