9. Sean Lee is Back
Last year, Sean Lee was expected to be the lone bright spot on an otherwise dismal defense. Instead, Lee tore his ACL before the season started during a blocking drill with rookie Zach Martin. Though another injury Is a risk for the Penn State product who also missed significant time in 2012 and 2013, a full season Lee would be a huge boost to the Dallas D. Strong against the run, Lee is one of best coverage linebackers in the game.