Bertie Caplan

Bernard "Champ" Kaplan (May 7, 1913 – June 14, 1992) was an American football offensive lineman in the National Football League for the New York Giants and the Philadelphia Eagles.
A two-time national collegiate boxing champion in the light heavyweight class, Kaplan signed with Philadelphia fight manager Joe Jacobs in 1935 and was touted as "The Jewish Jack Dempsey" and a potential contender for the heavyweight boxing title, fighting at 189 pounds.

Biography fallback source: Wikipedia