An official Arizona Diamondbacks 25th Anniversary MLB baseball autographed by Hall of Famer RANDY JOHNSON. Signature is in blue ball point pen with the inscriptions "#51 Retired" and "8.8.15". This would make a great addition to any Diamondbacks collection! This item is guaranteed to be 100% authentic and will include a COA from JSA (James Spence Authentication) with matching serial numbers. You are purchasing the exact baseball in the photograph.