This Autographed William White Onl Baseball has been Personally Signed by Rod Beck, Bud Black, Bryan Hickerson, Dave Righetti, Will Clark, Royce Clayton, Matt Williams, Mark Leonard, Cory Snyder, Ted Wood & 19 more of the San Francisco Giants. 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. The Roger Craig and Gary Carter signatures were determined to be Clubhouse signatures.