Boxer known as the Boston Strong Boy. Fighting on turf, and with bare knuckles, Sullivan became the heavyweight champion of the world under the London Prize Ring rules by defeating Paddy Ryan on February 7, 1882. Ten years later, on September 7, 1892, he lost the championship to James J. Corbett under the new Queensberry rules. Fountain pen signature, 'Compliments of John L. Sullivan,' on an off-white 3 x 2.25 card, dated November 17, 1910. Double matted, in removable fashion, with a nice photo of Sullivan, to an overall size of 7.5 x 14. In fine condition. RRAuction COA.