[4][5] Stone was born Harry Seifstein to Jewish parents on the New York City's Lower East Side, and grew up in poverty in a family of eight.

[2] In need of money, Stone began working as a newspaper boy in the Bowery at the age of 11, first selling papers near Tom Sharkey's bar on West 67th, and later in the Tenderloin district in lower Manhattan.

On August 18, 1909, only three years into his career, Stone fought a competitive, ten round no title and no decision bout in Saratoga, New York, against the reigning world featherweight champion, Abe Attell.

Attell won by the accounts of most newspapers, but the San Francisco Call, said Stone showed promise and "came with a rush that earned him a draw".

Stone took an important early win in a slow and deliberate twenty round points decision against Terry McGraw on October 4, 1909, in Baltimore.

[12][13][14] Facing his best known opponent on November 29, 1909, Stone fought Hall of Famer, and future world welterweight champion Jack Britton, losing a six-round newspaper decision.

His inability to climb his way to the top in the competitive New York boxing world, soon spurred Stone to consider the larger crowds and bigger purses in Australia.

[18] On September 26, 1911, Stone lost a ten-round newspaper decision to well known lightweight Young Nichie at New York's Twentieth Century Athletic Club.

Losing by only a shade in an action packed six rounds, he attempted to put Gates away early but met his match in his skilled opponent's counter-attack.

[21] Stone defeated high rated fringe lightweight contender Joe Thomas on April 1, 1912, in what was arranged to be a draw in New Orleans, Louisiana.

Stone's victory put him in line to face Frank Russell for a second time in a bout that would end in another draw, but on points.

[22] Though he had a ten-pound weight advantage, Stone lost to featherweight Joe Shugrue on August 26, 1912, in a rare match in New York's historic Madison Square Garden.

[23] On November 29, 1913, at the age of only twenty, Stone defeated the former English lightweight and future world welterweight champion Matt Wells before an impressive crowd of 12,000 in a fifteen-round points decision in Sydney.

Assessing Summers' skills, Stone wrote "He was a fighter with a world-wide reputation, and he had a wallop that would stop any clowning if he landed it, but his speed was not comparable to mine".

[29] On December 13, 1913, Stone defeated Pal Brown, one of his most skilled opponents, at the Olympia Athletic Club in Sydney, Australia in a twenty-round points decision.

[31] In a twenty-round points decision on June 15, 1914, Stone lost to the exceptional British lightweight Jerry Delaney before a sizable crowd in the National Sporting Club in Covent Garden, England.

Delaney was known to have a great deal of power in both fists, and was predicted to win the bout by the London Times, though Stone had a slight lead in the early betting.

[33] On September 8, 1914, Stone lost to the talented Jewish New York lightweight and fringe contender Phil Bloom in a ten-round newspaper decision in Brooklyn.

Bloom dominated the first six rounds and landed his left jab well in the second, despite the skills of Stone, who many reporters recognized as a serious world welterweight contender on the fringe.

[34] Bloom won, in the opinion of the Brooklyn Daily Eagle by a shade, but many in the crowd considered the efforts of both boxers to be minimal.

[36] Boston boxer Gallant would fight against many of the best fringe contenders of his era, including Charley White, Phil Bloom, and Frankie Callahan.

[37] On February 22, 1915, Stone defeated Lockport Jimmy Duffy at Broadway Auditorium in Buffalo, New York, losing in a ten-round newspaper decision.

[40] In an important early fight against a highly rated opponent, Stone defeated Frankie Russell before at crowd of 3000, in an eighteenth round disqualification in New Orleans on January 17, 1916.

According to British boxing historian Barry Wells, Stone claimed the world welterweight championship between 1914 and 1916, but the title was not sanctioned by a global body, as it would be later.

[9] Before a modest crowd of 2000, Stone lost any claim to the world welterweight title on March 1, 1916, to fellow Jewish boxer, London-born Brit Ted "Kid" Lewis, in a twenty-round one-sided thriller in New Orleans.

[48] Former Australian boxer and Olympian R. L. "Snowy" Baker was the promoter who brought Stone to Australia, where he arrived in 1916 to box and defeat Herb "Kid" McCoy on April 22, Easter Saturday, in a twenty-round points decision at Sydney Stadium.

In a bout with a top Australian lightweight contender on June 9, 1919, Stone defeated Herb "Kid" McCoy in Adelaide, Australia, in a match that was stopped in the twelfth round.

In what was likely his greatest victory, Stone won the Australian lightweight title before an impressive crowd of 9000 on April 23, 1921, in a twenty-round bout in Melbourne, Australia, against Welshman Llew Edwards.

Stone lost the title later that year on August 20, 1921, in a well publicized twenty-round decision before a capacity house against Sid Godfrey in Sydney Stadium.

On May 8, 1926, in an important and widely publicized bout, Stone lost to Australian great Stan Craig of New South Wales in a twenty-round points decision in New Castle, Australia.