(25 Signatures). Key signatures include Tim Duncan, Robert Traylor, Keith Van Horne, Tracy McGrady, Chauncey Billups, Johnny Taylor, Kelvin Cato, Derek Anderson, Anthony Parker, Keith Booth, Brevin Knight, Antonio Daniels, Eric Washington, Adonal Foyle, John Thomas, Tim Thomas, Paul Grant, Scot Pollard, Charles Smith, Serge Zwikker and Jacque Vaughn.. Sport: Basketball,Player: Tim Duncan,Signed: Yes,Autograph Authentication: Professional Sports Authenticator (PSA),Original/Reprint: Original,Product: Ball,Team: San Antonio Spurs,Country of Origin: United States