New Orleans Saints quarterback Derek Carr is in the concussion protocol after sustaining his second concussion in three weeks, according to Saints coach Dennis Allen. Carr left Sunday's game against the Detroit Lions and the Saints' Week 10 game against the Minnesota Vikings to go into the concussion protocol but sustained other injuries in both of those games as well.

Dennis Allen shared an injury update on Saints quarterback Derek Carr, saying Jameis Winston will start in Week 14 if Carr can’t play:

The boos seemed to rain down on Derek Carr until Lions defensive tackle Bruce Irvin crashed down hard on top of the the Saints quarterback with a little more than 10 minutes left in New Orleans’ 33-28 loss to Detroit.

New Orleans quarterback Derek Carr (concussion protocol, shoulder, back) exited Sunday's Week 13 game against the Detroit Lions.

Derek Carr was banged up on Sunday. The New Orleans Saints quarterback took a big hit from Detroit Lions linebacker Bruce Irvin that drew a foul, but the damage was done. After receiving assistant from the Saints medical staff, Carr left the field and didn’t return.

Jameis Winston is in at quarterback for the Saints after Derek Carr suffered an injury in the fourth quarter. As Carr was throwing a pass, Lions pass rusher Bruce Irvin delivered a brutal shot, landed on Carr with all his bodyweight, and was flagged for roughing the passer.

New Orleans quarterback Derek Carr went to the locker room in the fourth quarter of the Saints' 33-28 loss to the Detroit Lions on Sunday, and did not return following a hit that resulted in a roughing-the-passer penalty.

"He's being evaluated," Coach Dennis Allen said Monday. "He's in the concussion protocol but he's also being evaluated for a rib injury. We don't have all of the results back on that, but the shoulder seemed like it came out fine. We'll evaluate him as we go throughout the week, see what his availability will be."

Derek Carr has a concussion for the second time in three games, but New Orleans Saints coach Dennis Allen said Monday it’s “too early” to say if that will prevent