One of the Panthers' biggest strengths on defense appears to have gotten stronger still this offseason.
With already arguably the best duo of linebackers in the league, Carolina invested its first-round draft choice on an intriguing linebacker. Throughout training camp and the preseason, it will be interesting to see how often the Panthers feature a third linebacker after often going with just their top two in 2014.
RETURNERS
Luke Kuechly
Has led the NFL in tackles in two of his first three seasons. The one year he didn't pace the league, in 2013, he was named NFL Defensive Player of the Year.