Griffey retired in 2010 but has continued to work for the Seattle Mariners in different capacities. Griffey attended this game and the Seattle Mariners gave him this jersey to wear. Since he didn’t actually play in the game the jersey is authenticated as “Team Issued” and not game used. This game featured the Seattle Mariners vs. As seen in the pictures the jersey is authenticated with the official Major League Baseball hologram sticker. The number on the sticker is EK 711149 and can be searched on the MLB website which provides authentication details. Please also see the Seattle Mariners letter that accompanies the jersey. This is an EXTREMELY rare Griffey jersey and a must have for any Griffey fan. I’m also including 2 Ken Griffey Jr cards which contain game used bat and jersey pieces. You won’t likely see another Griffey jersey like this so don’t miss out. Thanks for looking and good luck. The item “Ken Griffey Jr Jersey April 13, 2013 M’s vs Tex MLB holo + game used bat card” is in sale since Monday, January 18, 2016. This item is in the category “Sports Mem, Cards & Fan Shop\Game Used Memorabilia\Baseball-MLB\Jerseys”. The seller is “carlee888″ and is located in Port Orchard, Washington. This item can be shipped to United States.