This is an Official American League (Brown) baseball, formerly a part of the Barry Halper collection, that has been signed by 19 members of the elite 500 Home Run Club. Mickey Mantle and Ted Williams signed on the sweet spot; their signatures grade 8/10. Other sluggers who autographed this ball include Willie Mays (8), Mark McGwire (8), Ken Griffey Jr. (8), Frank Thomas (8), Alex Rodriguez (6), Rafael Palmiero (4), Gary Sheffield (3), Hank Aaron, Frank Robinson, Eddie Matthews, Ernie Banks, Harmon Killebrew, Reggie Jackson, Eddie Murray, Willie McCovey and Mike Schmidt. Ball is NRMT and comes with an LOA.