"It's a concern," coach Brad Childress said. "Your legs are your legs. We'll just see how he comes out by the time we get to Sunday."
Peterson did not specify which leg was injured, only saying that it was "pretty sore" and had him worried when it tightened up while he was pushing the pile in the fourth quarter.
"This is how we get our work done. Our legs," Peterson said. "That's the most important part of our body, so it was pretty scary."
http://sports.espn.go.com/nfl/news/story?id=3596180
your legs are your legs, childress

i probably should add, since i didn't quote the article very well, that its a slight hamstring injury