This autographed OAL Baseball has been personally hand-signed by David Wells, David Cone, Domingo German & Don Larsen of the New York Yankees. All the signers added PG along with the date they threw their no-hitters along with their signatures. This autograph is certified by Beckett Authentication Services (BAS) Witness Certification. That means that a Beckett representative was present when this item was signed. It comes with the numbered authentication hologram with a QR code that verifies the authentication on the Beckett website.