signed by 28 members of the '56 squad in blue ink. Key signatures on the ball include those of Hall of Famers Jackie Robinson, Roy Campanella, Gil Hodges, and Dick Williams, with additional signatures from Dixie Howell, Randy Jackson, Bob Darnell, Rube Walker, Don Zimmer, Roger Craig, Don Newcombe, Don Demeter, Sandy Amoros, and Carl Erskine. The signature of Duke Snider has been deemed a clubhouse by JSA.. Signed: Yes,Sport: Baseball,Player: Jackie Robinson,Autograph Authentication: James Spence (JSA),Original/Reprint: Original,Product: Ball,Team: Brooklyn Dodgers,Country of Origin: United States