I never heard anything about dolph, but I heard sly used winny during rambo. Makes sense because he only weighed somewhere around 180-185lbs but was really vascular.

Another "had to be juicer" was George Lynch from the 80's rock band dokken. At 40 years old he was scrawny, then a couple years later he was massive. No way you can gain over 30 lbs in 2-3 years at that age.