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.
Billy Miske Billy Miske, alias "The Saint Paul Thunderbolt" (April 12, 1894 – January 1, 1924), was a professional boxer from Saint Paul, Minnesota. During his tenure as a pugilist he had multiple-bout series with a plethora of all-time greats including Harry Greb, Jack Dempsey, Jack Dillon, Tommy Gibbons, Bill Brennan and Battling Levinsky, among others. Despite a career shortened by illness and an early death, statistical website BoxRec still lists Miske as the No. 26 ranked heavyweight of all-time.