Ravens safety Kendrick Lewis went straight to the locker room after suffering a head injury in the second quarter Sunday against the Cincinnati Bengals, and is in the concussion protocol, the team announced.
He was ultimately cleared, the team announced, and returned to the game after halftime.
Lewis went head-first into Bengals receiver Marvin Jones in a last-ditch effort to prevent Cincinnati from taking a two touchdown lead with 12:18 remaining in the second quarter. He remained on the field for several minutes, and eventually got to his feet and walked straight into the locker room.
Second-year safety Terrence Brooks replaced Lewis in the Ravens' secondary.
The injury came at the end of the Bengals' second touchdown drive of the first half.
Jones beat cornerback Rashaan Melvin with an inside move, and scored a 13-yard touchdown to give the Bengals a 14-0 lead.