While the code words help disguise what the Lions are running on a play-by-play basis, teams can identify tells and tendencies simply by watchng the tape. As a result, Campbell knows that a lot of what the team likes to do is not a secret.

All NFL teams carry a 53-man active roster. Teams also get a 16-person practice squad, which can serve in a variety of capacities depending on the team. For Dan Campbell and the Detroit Lions, that practice squad is effectively an extension of the 53-man roster.

With an impressive 11-1 record heading into the final month of the regular season, the Detroit Lions are firmly in playoff contention, and several veterans from their practice squad are stepping up to help secure a strong finish.