MLB 500 Home Run Club Mickey Mantle, Frank Robinson, Hank Aaron and Others (8 Signatures) Signed Baseball W/LOA - This Rawlings RO-A baseball is signed by (8) legendary Major League Baseball 500 Home Run Club members. The signatures include: Mickey Mantle, Frank Robinson, Hank Aaron, Ernie Banks, Harmon Killebrew, Willie Mays, Eddie Mathews, and Willie McCovey. The baseball comes with a letter of authenticity from JSA. The ball has been kept in a protective plastic capsule.