Jaguars' Myles Jack in concussion protocol

Jacksonville Jaguars linebacker Myles Jack has been placed in the concussion protocol after exiting Thursday night's win against the Tennessee Titans, the team announced.

Jack appeared to take a knee directly to his head while attempting to make a backfield tackle toward the start of the second half.

The 24-year-old is a key leader of Jacksonville's talented defense. He racked up a half-sack and nine tackles over the first two games this season.

With Jack sidelined, Najee Goode entered for the Jaguars, playing alongside Quincy Williams and Leon Jacobs.