"Minnesota Vikings running back Adrian Peterson limped off the field late in the first quarter after hurting his left ankle on a 12-yard rush. His return to today's game against the Oakland Raiders at the Metrodome was deemed questionable. Peterson's left ankle was hurt when Oakland safety Michael Huff was trying to tackle him. Trainers helped Peterson off the field, and minutes later he was carted off the field. Backup Toby Gerhart replaces Peterson, who entered the game 191 yards shy of Robert Smith's franchise rushing record. Peterson has six carries for 26 yards, including a 12-yard touchdown. "