I didn't know who scott steiner was so I did a search.
It lists his stats at 6' 1" 270 If pro wrestling is like many sports that means he probably means he is more like 250 to 260.
To me at his heighth it would NOT take GH for the average person to get that big with dedication, proper eating, super suplements for years. Someone with horrible genetics might never get that big no matter what they did.