Given his dark hair and muscles, I would say that he is about 35, maybe a lil younger or a lil older. I doubt that he is younger than 27 or older than 45.
He was born in 1962, making him 46 on his birthday this year. (2008)
Big John Studd was born on February 19, 1948 and died on March 20, 1995. Big John Studd would have been 47 years old at the time of death or 64 years old today.