‘Figure out the defensive backfield sub-packages. The Bills’ starting secondary is set with corners Tre’Davious White and Vontae Davis and safeties Micah Hyde and Jordan Poyer, but they have a mostly new depth chart behind them. Rookie fourth-round pick Taron Johnson and free agent Phillip Gaines are in line to be the nickel corner, and rookie Siran Neal could work his way into the dime package, while a couple other players to watch are cornerbacks Levi Wallace and Lafayette Pitts.’