This Autographed Warren Giles Onl Baseball has been Personally Signed by Notable Signatures Include Roberto Clemente, Bill Mazeroski, Dick Groat, Don Hoak, Johnny Logan, Dick Stuart, Hal Smith, Smokey Burgess, Tom Sturdivant, Bobby Shantz, Vinegar Bend Mizell, Al McBean, Clem Labine, Harvey Haddix, Joe Gibbon, Earl Francis, Roy Face, Roman Mejias, Walt Moryn, Bill Virdon of the Pittsburg Pirates. This item is 100% Authentic and comes with a PSA/DNA Certification Card and a matching numbered Hologram. The authenticity can be verified on Professional Sports Authenticator website.