Rocky Balboa is loosely based on this American former professional boxer who fought at heavyweight ans was born in what year
Chuck Wepner Charles "Chuck" Wepner (born February 26, 1939) is an American former professional boxer who fought at heavyweight. As a world ranked contender he fell just seconds short of a full fifteen rounds with world heavyweight champion Muhammad Ali in a 1975 title fight. Wepner also scored notable wins over Randy Neumann and Ernie Terrell.
Jess Willard Jess Myron Willard (December 29, 1881 – December 15, 1968) was a world heavyweight boxing champion known as the Pottawatomie Giant who knocked out Jack Johnson in April 1915 for the heavyweight title. He was known for his great strength and ability to absorb tremendous punishment, although today he is also known for his title loss to Jack Dempsey.