"We'll do an MRI to learn more about it," Frazier said. "Right now, it's being diagnosed as a sprain."
Peterson was injured late during the first quarter when a defender landed on his left leg at the end of a 12-yard run. He had to be helped off the field by trainers and wasn't able to put any weight on his left leg. After getting checked on the trainer's table, the cart came to take Peterson away.
Peterson said he hopes he won't have to miss next Sunday's game at Atlanta. "That's not in my DNA," he said, according to the St. Paul Pioneer Press. "I'm going to try to get back as fast as I can and God willing, I'll be up and ready to run this weekend."