Get your hands on this ball signed by some of the most feared sluggers in MLB history. This ball has 18 HOF signatures featuring Mickey Mantle and Hank Aaron right on the sweet spot. The signatures on this Bart Giamatti ball average 8/10 and include: Frank Robinson, Joe DiMaggio, Stan Musial, Al Kaline, Willie Stargell, Ted Williams, Ernie Banks, and more.