Quarterbacks take beating this week

Lions quarterback Matthew Stafford left for good in the fourth quarter Sunday against Minnesota to undergo concussion protocol after being struck in the head during a sack, a mishap that capped a very difficult week for the leader of Detroit’s offense.

After the game, Stafford was cleared of concussion protocol.

Washington QB Kyle Allen dislocated his left ankle late in the first quarter against the New York Giants, forcing Alex Smith into the game. Allen’s leg bent the wrong way on a sack by Jabrill Peppers, who was flagged for unnecessary roughness, and there was an air cast on the quarterback’s leg as he was carted off.

The Baltimore Ravens lost five-time Pro Bowl defensive end Calais Campbell to a left calf injury in the first quarter against the Colts.

Denver tight end Albert Okwuegbunam left with a knee injury suffered in the second half against Atlanta and did not return.

Indianapolis Pro Bowl tight end Jack Doyle left for good late in the first half with a concussion.

Titans tight end Mycole Pruitt hurt his right knee late in the first quarter against Chicago and had to be helped off the field.

Titans guard Rodger Saffold hurt a shoulder in the second quarter and went to the locker room, and defensive back Dane Cruikshank injured his groin.

Chicago defensive back Sherrick Mcmanis hurt his hand and didn’t return.

Houston lost linebacker Brennan Scarlett in the first quarter when he injured his arm. The Texans also lost running back David Johnson (concussion), guard Senio Kelemete (concussion) and defensive end Charles Omenihu (leg).

Steelers QB Ben Roethlisberger went to the locker room after throwing a first-half touchdown pass, bothered by a left knee injury. Mason Rudolph had to replace him when rookie Dallas receiver Ceedee fumbled after a catch. But Roethlisberger returned in the second half and led the Steelers to the win.

The Cowboys didn’t even make it to the opening kickoff before losing a player in their game against Pittsburgh. Joe Looney replaced Tyler Biadasz at center after the rookie injured his hamstring during warmups. Biadasz previously got the starting job after Looney was forced out for three weeks with a knee injury.