The Steelers also lost linebacker LaMarr Woodley with a strained right hamstring.
Browns middle linebacker D'Qwell Jackson left Cleveland's 41-27 loss to the Giants with a concussion and did not return.
Jackson, one of the team's defensive leaders, was hurt in the second quarter, when the Browns allowed 20 points. The Browns also lost starting cornerback Dimitri Patterson in the second half to an ankle injury.
The Giants also lost a player to a head injury when backup running back Andre Brown took a hard hit on a kickoff runback.
Titans running back Javon Ringer was carted off the field in the fourth quarter of a 30-7 loss to the Minnesota Vikings with a left knee injury.
Ringer was injured with just over three minutes to play after catching a pass near the sideline and heading up the field. Vikings cornerback Josh Robinson wrestled him to the turf, twisting the running back down awkwardly.
Ringer's knee appeared to buckle as he went down, and he immediately grabbed it in pain as teammates gathered around him. There was no immediate word on the severity of his injury.
New Orleans starting cornerback Jabari Greer left Sunday night's 31-24 win over San Diego because of what team officials called a hip injury.
Greer was hurt late in the second quarter and did not return, a blow for a New Orleans team already ranked last in the NFL in defense.
Second-year pro Johnny Patrick took over for Greer, with rookie Corey White entering on passing downs as the nickel back.
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