This Autographed Gene Budig Oal Baseball has been Personally Signed by Jason Giambi, Bill Taylor, Brent Mayne, Rafael Bournigal, Duffy Dyer, Jimmy Haynes, Art Howe, Mark Bellhorn, Scott Spiezio, Mike Oquist, Don Wengert, Mark Mohler, Brad Fischer, Ernie Young, Buddy Groom, Tony Batista, Brad Rigby, Ben Grieve, Buddy Groom, Dave Magadan, Denny Walling, Scott Brosius, Jason McDonald, Aaron Small and Brian Lesher 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.