Articles and news such as this always brings me back to when Neyland Stadium was turf. From what I remember it was the first football field with artificial turf and seemed to bring in recruits. Then, after Chuck Webb went down, we lost some recruits because of the turf field. I'm not saying his injury is why but turf was bad.
Also, I remember several years ago watching a T.V. program on athletes, football players specifically, have lots of ACL and MCL tears. The show seemed to insists it was because athletes were larger and stronger and thus, the ligaments could not with stand the major stresses when cutting and turning.