if they'd start juice sooner (say growth hormone in their childhood) maybe they would've reached a normal height
By what Priest looked like as a teen, it appears he started way before his 18th bday.
Momo started training late, and won his 1st show 2-3 yrs later, the World Champs.
Padilla also looked very impressive as a young teen, think he started messing with weights at 10, juice probably round about same time as Priest.