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. Ink signature, “Compliments of John L. Sullivan, Nov. 14th, 1899,” on an off-white 3 x 1.75 card. Accompanied by an original unsigned 4.25 x 6 cabinet photo of Sullivan as Heavyweight Champion of the World, and a hardcover copy of The Great John L. In fine condition, with a mild overall shade of toning, a bit heavier to lower left corner tip of signature, and some mild surface wear to photo. Pre-certified Steve Grad/PSA/DNA and RRAuction COA.