This Autographed Bobby Brown OAL Baseball has been Personally Signed by Mickey Mantle, Ted Williams, Willie Mays, Mike Schmidt, Hank Aaron, Warren Spahn, Eddie Mathews, Harmon Killebrew, Ernie Banks, Reggie Jackson & Frank Robinson. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by JSA. The authenticity can be verified on JSA website.