1989 Ken Griffey Jr. Rookie Signed Game Issued Seattle Mariners Jersey JSA COA. Rare 1989 Ken Griffey Jr. Rookie Signed Game Issued Seattle Mariners Jersey With Full Letter COA From JSA. We specialize in sports autographs and memorabilia. We have one of the largest selections of baseball autographs in the country. The item “1989 Ken Griffey Jr. Rookie Signed Game Issued Seattle Mariners Jersey JSA COA” is in sale since Monday, February 27, 2017. This item is in the category “Sports Mem, Cards & Fan Shop\Game Used Memorabilia\Baseball-MLB\Jerseys”. The seller is “showpiecessports” and is located in Deal, New Jersey. This item can be shipped to United States.

• Autograph Authentication: Professional Sports (PSA/DNA)