27 signatures on a Giles ONL baseball: Bob Gibson, Rose, Seaver, May, Millan, Singer, Beckert, Schoendienst, Carlton, Bristol, Mays, Dierker, Allen, Marichal, Jones, Niekro, Perez, Jackson, Aaron, Banks, Staub, Bench, Santo, Cannizarro, Koosman, and a mint Roberto Clemente. All were signed in person by the All-Stars and there are NO clubhouse signatures. NRMT. Game was played at the 1969 Professional Baseball Centennial at RFK Stadium in Washington, D.C.