Official American League baseball (Brown) has been autographed by 11 members of the famed 500 home run club. Ted Williams signed the sweet spot. The ball is also signed by Mickey Mantle, Willie McCovey, Ernie Banks, Reggie Jackson, Hank Aaron, Harmon Killebrew, Frank Robinson, Mike Schmidt, Willie Mays, and Eddie Mathews. Overall, the signatures and baseball grade and 8/10.