This Autographed Game Used Rawlings Adirondack Player Model Baseball Bat with the inscription of "To Jamie Best Wishes" has been Personally Signed by Mike Gallego of the Oakland Athletics. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website. There is no paperwork for the game use. We purchased from a former Oakland A's employee from that and the stamping and markings on the bat do lead us to believe this is in fact game used.