Throwing a perfect game automatically seals a pitchers' name in the record books, and only 23 pitchers have accomplished this milestone in the last 132 years. Almost half of those pitchers have signed this near mint (NRMT) Official National League Giamatti baseball and the signatures average 7/10 in strength. Some of the pitchers added the dates of their perfect game while others have dates written in another hand. On one of the side panels, Sandy Koufax signed and inscribed his date as well as a "Best Wishes" salutation. Other signatures include Hunter, Larsen, Barker, Haddix, Martinez, Jones, Rogers, Browning and Bunning. This is a "perfect" opportunity to own a piece of baseball history.