Nelson began
boxing professionally at age fourteen, in 1896. He fought for the vacant lightweight title against
Jimmy Britt on December 20, 1904, but lost a twenty-round decision. He lost to
Abe Attell in 1905, but his win over Jack O'Neill secured him another shot at the world championship. On September 9, 1905, Nelson finally beat Britt in a knockout in the 18th round of a 45-round bout. He defeated
Terry McGovern in a no-decision Newspaper decision, but then faced a greater challenge when he faced off against the reigning world lightweight champion
Joe Gans on September 3, 1906, in
Goldfield, Nevada. Gans dropped Nelson repeatedly during the bout, but could not knock him out. Finally, in the forty-second round, Nelson hit Gans below the belt causing him to lose the fight by disqualification. In 1907 and 1908, Nelson split a pair of bouts with Britt and fought Attell to a draw. He then challenged Gans again for the world lightweight title on July 4, 1908. This time he knocked Gans out in the seventeenth round. Two months later, Nelson knocked out Gans in the twenty-first round. In 1909, Nelson fought
Ad Wolgast in a fight held over the lightweight limit. Wolgast beat him, and Nelson gave Wolgast a chance at his title on February 22, 1910. Eventually unable to see due to the accumulation of punches, Nelson lost the title when the referee stopped the fight in either the fortieth or the forty-second round. Nelson continued to fight, and in 1917, he challenged
Freddie Welsh for the lightweight title. He lost a twelve-round decision and retired from fighting in 1920. He was elected to the
International Boxing Hall of Fame in 1992. In 2016, award-winning biographer Mark Allen Baker published the first comprehensive biography of Nelson with McFarland, a leading independent publisher of academic and nonfiction books. ==Motion pictures of Nelson's fights==