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Seattle’s Raheem Brock hit Roethlisberger in the knee after the quarterback completed a 16-yard pass to Heath Miller. Roethlisberger lay on the Heinz Field turf for several minutes before gingerly making his way to the sideline.

Green Bay Packers safety Nick Collins was carried off the field on a stretcher after he injured his neck in the fourth quarter of a 30-23 win over the Carolina Panthers.

Collins was hurt as he tried to tackle Panthers running back Jonathan Stewart on a catch. Stewart attempted to hurdle Collins, whose head appeared to hit Stewart’s left hip as he dived for Stewart’s legs. Collins’ neck bent awkwardly and he landed face down on the turf.

Collins gave a slight wave to the crowd while being carried off the field. In a postgame statement on their website, the Packers said Collins had “normal feeling and complete movement” in his extremities and would be kept overnight in a hospital for observation.

New York Jets All-Pro center Nick Mangold has a sprained right ankle, but X-rays were negative.

Mangold limped off the field late in the first quarter of the Jets’ 32-3 victory over Jacksonville and did not return.

Coach Rex Ryan said Mangold would get an MRI exam Monday.

Mangold entered the Jets’ locker room after the game on crutches with his right foot in a boot.