Patrick Mahomes, star quarterback for the Kansas City Chiefs, has hand signed this Chiefs Riddell Speed Chrome mini helmet at a private signing. This item comes with a certificate of authenticity (COA) from JSA – James Spence Authentication and was signed in the presence of one of their representatives. You will receive a serial numbered COA along with a matching serial numbered sticker on the helmet. The authenticity can be verified online by entering the serial number.
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