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A penalty flag lies on the field in the first half of an NFL football game between the New Orleans Saints and the Baltimore Ravens in New Orleans, Monday, Nov. 24, 2014. (
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A penalty flag is seen on the field during the first half of an NFL football game between the Minnesota Vikings and the Oakland Raiders Sunday, Nov. 20, 2011, in Minneapolis. (AP
Seattle Seahawks defensive back Marquise Blair, right, hits Denver Broncos wide receiver Nick Williams, left, drawing a penalty flag for unnecessary roughness during the second half of an NFL football preseason game
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