This is a Size 48 National League All Star Game Used Jersey that was worn by Atlanta Braves All Star Jonny Venters during workout day and the Home Run Derby. The 2011 All Star game and Home Run Derby were held at Chase Field in Phoenix Arizona, the home of the Arizona Diamondbacks. MLB. Com/mlb/authentication/ and typing in the hologram code on the Jersey. (The code is FJ742278). Check out my feedback, my customers are always satisfied.