This Autographed 2009 World Series Logo Oml Baseball has been Personally Signed by Derek Jeter, Mariano Rivera, Mark Teixeira, Johnny Damon, Jorge Posada, Joe Girardi, Hideki Matsui, Alex Rodriguez & Andy Pettitte of the New York Yankees. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Steiner Sports.