This is an Official MLB Baseball that has been hand signed by the 6 members of the Seattle Mariners Combined No Hitter. The 6 members of the Seattle Mariners' combined no hitter are: Kevin Millwood, Charlie Furbush, Stephen Pryor, Lucas Luetge, Brandon League, & Tom Wilhelmsen. This item has the official Major League Baseball serial numbered hologram for authenticity. This number can be verified on the MLB website. Although MLB does not issue a paper certificate with their items, a certificate can be printed out on their website.