Rawlings Official Major League Baseball. Hand-signed and inscribed in blue ink pen by Don Larsen. The autograph includes an official James Spence Authentication (JSA) hologram and matching COA for authenticity purposes. Larsen pitched the 6th perfect game in MLB history, doing so in Game 5 of the 1956 World Series It is the only no-hitter / perfect game in World Series history and is one of only two no-hitters in MLB postseason history.Authentication: JSA COA