Carolina Panthers Credit- Reinhold Matay/USA TODAY Sports Key FA: Mike Adams, Matt Kalil, Captain Munnerlyn, Julius Peppers Rookies: Christian McCaffrey,...

Chicago Bears Credit: ChicagoBears.com Key FA: Prince Amukamara, Mike Glennon, Rookies: Mitchell Trubisky, Adam Shaheen, Eddie Jackson Key Losses: Alshon...

Dallas Cowboys Credit: Justin K. Aller/Getty Images Key FA: Nolan Carroll Rookies: Taco Charlton, Chidobe Awuzie, Jourdan Lewis, Ryan Switzer,...

Kristopher Skinner/Bay Area News Group) Football: it’s an evolving game every season. Players are constantly on the move from team...