Saints' Derek Carr Placed in Concussion Protocol After Week 13 Loss to Lions

New Orleans Saints quarterback Derek Carr entered concussion protocol following Sunday's 33-28 loss to the Detroit Lions, per ESPN's Katherine Terrell.

Carr was also evaluated for shoulder and back injuries after leaving the game in the fourth quarter.

When asked after the game if Carr's concussion was serious, Saints head coach Dennis Allen told reporters, "I don't know that."

"He's going in for evaluation on a couple of different things but he's in the concussion protocol," Allen said, per Terrell.

Carr recorded 226 yards on 17-of-22 throwing for one touchdown and one interception prior to his injuries.

Carr was injured in the fourth quarter following a hard hit by Lions defensive end Bruce Irvin. Irvin was flagged for roughing the passer on the play.

The Saints quarterback, who was in visible pain after the hit, was able to walk off the field but did not return to the game.

Quarterbacks Jameis Winston and Taysom Hill finished out the contest but could not complete a fourth-quarter rally to tie the score.

This is the second time this season Carr has been placed into concussion protocol.

The quarterback was evaluated for a concussion and a shoulder injury on November 12 after a hit from Minnesota Vikings defensive end Danielle Hunter forced his early exit from the Saints' Week 10 loss to the Vikings.

Carr cleared concussion protocol 11 days later, following the Saints' bye week.

This also marks Carr's third shoulder injury this season, including the sprained AC joint in his right shoulder he suffered during a Week 3 loss to the Green Bay Packers.

Allen said after the game that there was "some concern with some of the injuries that (Carr's) suffered," per NFL.com's Christian Gonzales.

"I think anytime you have a concussion it's concerning... We'll go in and evaluate where he's at physically and then we will go from there," Allen said.

The Saints have a week to evaluate their starting quarterback before facing the Carolina Panthers at home next Sunday.