Featured is a Ken Griffey Jr Seattle Mariners signed 1989 Score #100T rookie card. This card has been hand signed by Griffey and has been authenticated and encapsulated by PSA, receiving an autograph grade of Gem MT 10. This card would make a great addition to any sports memorabilia collection!. SPECIFICATIONS Autographed By: Ken Griffey Jr Team: Seattle Mariners Sport: Baseball Authentication: Professional Sports Authenticator (PSA)