This is a White Majestic Seattle Mariners Jersey that has been hand signed by Felix Hernandez. Along with the autograph, this item also comes with the inscription which reads "PG 8-15-12". This one is size XL. Â This item has the official Major League Baseball serial numbered hologram for authenticity which 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.