That was over 46 years ago in 1976.
Today he is 82, and has starred in 94 movies in total, 80 since Rocky was released.
In Rocky, I think Burt Young looks:
Rocky scores 7.6 out of 10 on The Movie Database.
Burt Young's first acting role was as 'Willie Quarequlo' in The Gang That Couldn't Shoot Straight, released in 1971 when he was 31.