The injury is a major blow to the Razorbacks, who were 10-3 and reached their first BCS bowl game last season. The junior was hurt early in the scrimmage portion of practice on Thursday and was carted off the field without being able to put weight on his left leg.
Davis led all Southeastern Conference running backs with 1,322 yards rushing last season, averaging 147 yards per game over the final seven games of the season.
He was a preseason second-team All-SEC selection and had also been picked for the Doak Walker, Maxwell and Walter Camp Player of the Year award watch lists.
http://accesswdun.com/article/2011/8/241055