American professional boxer whose trickery and cruelty in the ring made him an infamous figure in boxing history.

A former sparring partner of welterweight champion Tommy Ryan, McCoy pleaded with Ryan for a title match as a benefit for himself, asserting that he was in ill health and needed money. Ryan, deceived, did not train seriously for the fight. McCoy, who was in excellent condition, knocked the champion out in 15 one-sided rounds to win the title on March 2, 1896. Growing into the middleweight divison (then 158 lb 【72 kg】), McCoy never defended the welterweight championship. On April 22, 1903, he lost a 10-round decision to Jack Root in the first light-heavyweight (175-lb 【80-kg】) championship bout. He also fought outstanding heavyweights.

An inveterate gambler, McCoy is thought to have bet against himself occasionally, as in his knockout defeat by James J. Corbett (Corbett, James J.) in 1900. He was married 10 times to eight women and served eight years in a penitentiary as a consequence of the death of one of his wives. Reduced to poverty, he committed suicide.