Griffey has signed both cleats. Both are signed beautifully and his signature is authenticated by JSA. Accompanied by a full LOA from JSA and a letter from the organization that Griffey donated these cleats to.Please see pictures and authentication. The item "Ken Griffey Jr. Seattle Mariners Game Used Cleats 1999 Signed LOA Excellent Use" is in sale since Wednesday, June 17, 2020. This item is in the category "Sports Mem, Cards & Fan Shop\Game Used Memorabilia\Baseball-MLB\Other MLB Game Used Mem". The seller is "gameusedgamers" and is located in Cincinnati, Ohio. This item can be shipped to United States.