Philadelphia Jack O'Brien

Joseph Francis Hagan was an American world light heavyweight boxing champion in 1905 when he defeated Bob Fitzsimmons for the universal world title. Rather than defending his title, O'Brien instead abandoned it in order to fight at heavyweight. Nat Fleischer, founder and editor of The Ring Magazine, ranked O'Brien as the No. 2 All-Time Light Heavyweight, and famed boxing promoter Charley Rose ranked him as the No. 3 All-Time Light Heavyweight.