Sports How long is the NFL concussion protocol? Here’s what it will take for Patrick Mahomes to play in AFC title game January 18, 2021January 18, 2021 Nancy Armour, USA TODAY Comments Off on How long is the NFL concussion protocol? Here’s what it will take for Patrick Mahomes to play in AFC title game What does Kansas City Chiefs quarterback Patrick Mahomes need to do in the NFL concussion protocol to return to action for AFC championship game.