"Scrawny?"
Are you looking at a different picture than me? The before picture of Ronnie would be a lifetime achievement for all but the most accomplished Getbiggers.
Ronnie had classic bodybuilding genetics, an ecto/meso mix with wide shoulders, small hips, small joints and unusually large muscle bellies. His excessive drug use allowed him to use poundages better suited to someone with powerlifting genetics, an endo/meso mix, thick from top to bottom, with a wide hip structure and big joints, like Kaz.