Autographed/Signed KHALIL MACK Chicago Retro Blue Football Jersey JSA COA Auto This is a custom jersey and was not manufactured by or in any manner associated with any professional sports league or manufacturer. This custom jersey carries no professional sports league designation. The item is intended to be an autographed collectible. Reference of team in the title is to allow the purchaser a point of association. The custom jersey displays the name, number and authenticated signature of the player. This item in no way is affiliated with or connected to any professional sports organization. The autograph, as always is guaranteed to be authentic and has been certified as authentic by a third-party, trusted authenticator. Size is XL unless otherwise noted.