This is a Black Nike Seattle Mariners Jersey that has been hand signed by Ken Griffey Jr. This item was inscribed "Seattle Mariners, 1989-2000 2009-2010." There is an imperfection in the signature as shown. This item has been certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof QR Code sticker that can be verified on the Beckett-authentication.com.