Featured is a Ken Griffey Jr. signed Seattle Mariners 1989 Donruss #33 Rookie card. This card has been hand signed Seattle Mariners Seattle Mariners by Griffey and has been slabbed and authenticated by Beckett, receiving an autograph Grade 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: Beckett Grading Services