Carolina quarterback Cam Newton suffered a hairline fracture to a rib during Friday's preseason game against New England.
Newton suffered the injury late in the second quarter when he scrambled and absorbed a hit from Patriots linebacker Jamie Collins.
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Panthers head coach Ron Rivera is optimistic Newton, who had offseason ankle surgery, will be able to play in the Sept. 7 opener at Tampa Bay.
Newton threw 24 touchdown passes and ran for six more scores last season. He completed 61.7 percent of his passes for 3,379 yards.
[SportsNetwork.com]