Spalding basketball signed by the 2013-14 san antonio spurs. this ball has 11 signatures from the 2008 silver stars. the ball is signed by the following players: (all signatures have been authenticated by psa/dna) notable signatures include vickie johnson, erin perperoglou, becky hammon, and helen darling. all 11 autographs on this basketball were authenticated by a team of experts at psa/dna and comes with a letter of authenticity so you can rest assured you are purchasing the real deal.