Harry Stone (March 4, 1893 – December 13, 1950), born Harry Seifstein and nicknamed Hop Harry Stone, was an American boxer who competed primarily in Australia.
Stone's nickname of "Hop Harry" originated from a fight against Tommy Uren in which he employed a hopping motion that resembled the movement of a kangaroo.
He would become known for using this technique in his subsequent fights, as a trademark and in a small part to entertain his audience.
He had an effective left jab which became another signature trait.Stone's recorded fights number only around 150 from statistical site Boxrec, but he is one of only two boxers recognized to have fought over 200 bouts without being knocked out or stopped, a feat equaled only by Jewish boxer Benny Valgar.
He was inducted into the Australian National Boxing Hall of Fame in 2013 as an honorary international for making a major contribution to Australian boxing.Stone competed early in his career in the lightweight class, but competed in the welterweight and middleweight divisions in his later years.
He held both the Australian lightweight and welterweight title for several years.
Though detailed records may no longer exist, it is estimated he amassed over 500 bouts throughout his career, and claimed to have never been knocked out or knocked down in any of them.