John L. Sullivan_

John Lawrence Sullivan was an American professional boxer. Nicknamed the "Boston Strong Boy" and known as John L. among his admirers, he is recognized as the first heavyweight champion of gloved boxing, de facto reigning from 7 February 1882 to 7 September 1892. He is also generally recognized as the last heavyweight champion of bare-knuckle boxing under the London Prize Ring Rules, being a cultural icon of the late 19th century America, arguably the first boxing superstar and one of the world's highest-paid athletes of his era.