Mickey Rourke Good Genes or Good Docs?

5/30/2009 3:00 AM PDT BY TMZ STAFF
Mickey Rourke rebuilt his damaged career by playing "The Wrestler" ... and he doesn't have the scars to prove it.

Mickey Rourke
Here's the 31-year-old back in 1984 (left) -- and 25 years later, the 56-year-old version earlier this year (right).

He's as good as new.