The Carolina Panthers went out of their way to improve all three levels of their defense in free agency. Most of their resources naturally went towards plugging the giant holes up front in their interior defensive line rotation. One position group that didn’t see a whole lot of investment was the inside linebacker room – and that’s likely going to come back and haunt them. Thanks to the release of Josey Jewell – who’s still suffering concussion symptoms from last season – Carolina’s linebacker unit is now almost certainly the thinnest in the entire NFL.