Allen Park — A day after fully participating in practice, Detroit Lions center Travis Swanson was absent from the portion open to the media on Thursday.
The absence indicates Swanson had a setback in his recovery from a concussion.
Swanson reported concussion symptoms following the team’s Dec. 10 game against the Tampa Bay Buccaneers. He played every offensive snap in the victory.
He returned to practice last Friday, in a limited capacity, but was ruled out from playing in Sunday’s game against the Cincinnati Bengals.
Swanson missed the final five games last season under similar circumstances, first reporting a concussion after completing a game, and never getting clearance to return to action.
The Lions have had three offensive lineman report concussions after games this season. Most recently, backup guard Don Barclay was placed on injured reserve this week.
“They can manifest themselves 48 to, whatever, 72 hours afterwards,” Lions coach Jim Caldwell said. “And it just so happened that we’ve had a few guys that have done it. But I think our doctors do a great job with it. Once it’s identified, they put them through the protocol, and they do what the league has advised us to do.”