This Autographed Game Used Rawlings Adirondack Big Stick Pro Model Baseball Bat has been Personally Signed by Melvin Nieves of the San Diego Padres. This item is 100% Authentic and comes with a We Certification Card and a numbered Hologram #P6558 for the signature. The bat does not have a COA for the game use, however the wear exhibited along with the pine tar and markings lead us to believe these are in fact game used. The authenticity can be verified on We website. We only offers Authentic Autographs by Melvin Nieves through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.