2009 New York Yankees Team Signed World Series Baseball 9 Sigs Steiner 33947 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is an official 2009 World Series baseball that was personally autographed by 9 members of the New York Yankees team including Jorge Posada, Andy Pettitte, Hideki Matsui, Mariano Rivera, Mark Teixeira, Johnny Damon, Joe Girardi, Alex Rodriguez and Derek Jeter. This is the exact item that you will receive so please see pictures for condition. Includes a certificate of authenticity from Steiner Sports and Denver Autographs.