Running back Jerious Norwood, who was turning in a solid game, left the game in the second quarter Sunday night with a right hip flexor injury.
Chicago's defense was stuffing the Falcons rushing attack early, before the speedy Norwood changed the pace of the attack and got things going.
With fullback Ovie Mughelli already declared inactive for the game because of a calf injury, the Falcons were down to three running backs in Michael Turner, Jason Snelling and Verron Haynes.
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