John Arthur Root, known professionally as Jack Root was an American boxer. He was the first world light heavyweight champion as well as a challenger for the world heavyweight title. He fought out of Chicago. He was elected into the International Boxing Hall of Fame in 2011.

George Gardiner was a famous Irish boxer in America who was the first undisputed World Light Heavyweight Champion. He held claims to both the World Middleweight Title as well as the World Heavyweight Title. He was the second man in history to hold the World's Light Heavyweight title, defeating the first Light Heavyweight Champion, Jack Root, by KO after 12 rounds.