Kansas City loses its standout safety, Tyrann Mathieu, to a concussion.

Kansas City safety Tyrann Mathieu has been ruled out for the rest of the game and is in the concussion protocol, team officials said during the second quarter.

Mathieu’s head banged into the knee of a teammate in the first quarter. He soon jogged to the sideline to enter the blue medical tent, then went to the locker room.

Mathieu is a team captain and one of Kansas City’s best defensive players.

He joined the team in 2019 and was a key contributor to their Super Bowl run. Teammates said that he infused a hard-nosed, dogged attitude in the locker room. He is a three-time Pro Bowl selection and has been named to three All-Pro teams.