The Bears fear outside linebacker Leonard Floyd will be out for an extended period after he suffered a right knee injury that required him to be carted off in the fourth quarter of Sunday’s 27-24 loss to the Lions.

Floyd, the ninth pick in the 2016 draft, was in run pursuit when Bears cornerback Kyle Fuller collided with him while trying to make the tackle. Fuller hit Floyd in the right leg, and both players stayed down.

Floyd immediately grabbed his knee. Coach John Fox described the injury to reporters as "fairly serious.” In Floyd’s absence, rookie Isaiah Irving joined Pernell McPhee and Sam Acho in the rotation.

“That’s our boy, our soldier,” McPhee said. “There ain’t no load for me to pick up. I’m bred to do this.”

McPhee went on to ask for prayers for Floyd, who will have an MRI exam to determine the extent of the injury.

Fuller suffered a cut on his left hand. He returned to the game but required medical attention before he left the stadium.

Receiver Josh Bellamy entered the NFL’s concussion protocol after absorbing a hit in the third quarter.