NFL injuries: Cam with possible concussion, Davis also hurt
The Carolina Panthers didn't take any chances this time, removing quarterback Cam Newton to evaluate him for concussion symptoms after a hard hit in the fourth quarter of their 48-33 loss to the Atlanta Falcons on Sunday.
Newton was removed after he was hit cleanly by Falcons linebacker Deion Jones on a successful 2-point conversion run that pulled the Panthers within 34-18. Derek Anderson came on to replace the 2015 NFL MVP.
In the Panthers' season-opening Super Bowl rematch against the Denver Broncos, Newton took four helmet-to-helmet shots, but never came out of the game. Defenders Brandon Marshall and Darian Stewart were later fined by the NFL.
Panthers linebacker Thomas Davis also left the game with a hamstring injury early in the second half, and Carolina wide receiver Devin Funchess left the game in the fourth quarter with a toe injury.
The Washington Redskins, who lost four starters last week, had three defenders go down in the team's victory over the Browns. Top pass rusher Ryan Kerrigan left in the second quarter with an elbow injury, fellow linebacker Su'a Cravens left in the third with a concussion and safety David Bruton left in the fourth with a concussion.
It also was a difficult day for players in the secondary.
The Ravens, who allowed four touchdown passes by Derek Carr, the last a game-winner with 2:12 remaining, lost cornerback Maurice Canady in the first quarter with a thigh injury. Safeties Eric Weddle and Lardarius Webb both underwent concussion protocol in the fourth quarter, but were cleared to return.
In the Jets' 27-17 loss to Seattle, cornerback Darrelle Revis sustained a thigh injury in the fourth quarter and didn't return for New York, and right guard Brian Winters left in the second quarter with a head injury after he slammed helmets with a Seahawks defender. Winters was also called for unnecessary roughness on the play.
In other injuries:
-Panthers wide receiver Devin Funchess left in the fourth quarter with a toe injury.
-Raiders tight end Lee Smith left with an ankle injury in the second quarter and linebacker Malcolm Smith left in the fourth quarter with a groin injury.
-Ravens cornerback Maurice Canady left in the first quarter with a thigh injury and tight end Maxx Williams missed most of the second half after injuring a knee.
-Patriots tight end Martellus Bennett limped off the field and defensive tackle Vincent Valentine left in the third quarter with a back injury.
-Bills cornerback Corey White was evaluated for a concussion in the fourth quarter after being shaken up while covering a punt.
-Lions running back Dwayne Washington limped off in the first quarter with a left ankle injury.