Minnesota Vikings running back Adrian Peterson (28) is driven off the field after an injury during the second half of an NFL football game against Washington Redskins in Landover, Md., Saturday, Dec. 24, 2011. The Vikings said an MRI showed that Peterson tore the anterior cruciate ligament in his left knee, and coach Leslie Frazier will provide a further update at his news conference Monday. (AP Photo/Evan Vucci)
Read the article: Vikings RB Peterson tears ACL against Redskins
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