Delanie Walker suffers concussion

The Titans' Delanie Walker was knocked out of Sunday's game against the Colts with a concussion. AP Photo/AJ Mast

INDIANAPOLIS -- Tennessee Titans tight end Delanie Walker left Sunday's game against the Colts because of a concussion.

The Titans dropped the key AFC South matchup to the Colts, 22-14.

With the injury, the Titans were down to Taylor Thompson as their only healthy tight end. Craig Stevens was inactive because of a concussion suffered last week.

Reserve tackle Mike Otto regularly reported as eligible and worked as a tight end.

Walker came into the game as Tennessee's second-leading receiver with 44 catches and 449 yards to go with five touchdown receptions.

He had one catch for five yards in Sunday's game.