Official John Heydler National League baseball displaying a black fountain pen autograph of Hall of Fame pitcher Christy Mathewson across the sweet spot. Signature displays very nicely rating 7 out of 10 overall with a touch of fading to the "son" in the last name. As noted within the JSA letter of authenticity, the "C" and the "a" have the slightest touch of period blue ink enhancement visible under magnification and mentioned for accuracy only. The remainder of the "C" and the "a" in addition to the rest of the autograph have not been enhanced in any fashion. Note: PSA/DNA would not issue LOA due to policies related to the partial enhancement, noted for accuracy only. The ball itself exhibits some general handling/age wear including few minor surface abrasions with majority of manufacturer's stampings visible. Mathewson's status as one of the most feared pitchers in the game was equaled by the regard in which his peers held him as a gentleman. Autographs of the "Christian gentleman" are extraordinarily rare given his tragic passing in 1925 at the age of 45 due to tuberculosis contracted while exposed to mustard gas during service in World War I. Documented Mathewson single signature baseballs are at the top of most advanced collector's lists with the total population ranging between 10-20. Strong example with outstanding eye appeal. Includes full LOA from JSA: Ball: VG-EX, Signature: EX/MT-NM