Patrick Mahomes, MVP quarterback for the Kansas City Chiefs, has hand signed this red custom jersey at a private signing. Jersey is size XL and all letters/numbers are sewn-on. 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 jersey. The authenticity can be verified online by entering the serial number.