Former Kansas Jayhawk who hit the game tying National Championship shot vs. Memphis in the 2008 title game. Mario had his jersey # 15 retired by Kansas in 2013. One of the greatest Jayhawks of all time. He has also won 2 titles with the. Autograph is authenticated by James Spence Authentication (JSA). Item has a unique JSA sticker number fixed to the item with a matching certificate of authenticity from JSA. It is a "witness" certificate meaning a representative from JSA was present for the Chalmers signing and witnessed him signing your item. Chalmers also wrote 08 CHAMPS on the jersey. Custom jersey name and numbers sewn on. Size XL.