Riddell Kansas City Chiefs Proline On-Field Authentic SPEED football helmet, boldly signed on the right side in white paint pen by Chiefs Star QB Patrick Mahomes.

Signed at an official paid private autograph session (date and place detailed in the Certificate of Authenticity).

Sold with a photo of Mahomes signing helmets — taken at the autograph session.
Sold with Certificates Of Authenticity from both The Autograph Source (Lifetime Guarantee) and independent third-party authenticator Beckett Authentication Services James Spence Authentication (JSA).