MacGregor Official International League baseball signed by 21 players, including 19 members of the 1961 New York Yankees.  Though the signatures of Mickey Mantle and Roger Maris have both been deemed clubhouse signatures, the ball contains a number of other important names.  Signatures include Yogi Berra (HOF), Tony Kubek, Tex Clevenger, Clete Boyer, Bobby Richardson, Bob Hale, Ralph Terry, Bill Skowron, Jim Coates, Ed "Whitey" Ford (HOF), Hector Lopez, Hal Reniff, Elston Howard, Al Downing, Johnny Blanchard, Ronald Sheldon, Jack Reed, Luis Arroyo, and Billy Gardner. The signatures all exhibit some degree of fading, but are still largely legible. From the estate of Clyde King, with a full LOA from James Spence Authentication.