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.
Brian London Brian Sidney Harper (born 19 June 1934), known professionally as Brian London, is an English retired heavyweight boxer. He was the British and Commonwealth heavyweight champion from 1958 to 1959, and twice challenged for the world heavyweight title, losing to Floyd Patterson in 1959 and Muhammad Ali in 1966, both times via knockout. He was one of a quartet of British boxers, with Henry Cooper, Joe Erskine, and Dick Richardson, who dominated the British boxing scene throughout the 1950s and 1960s.