No NFL team is capable of producing a perfect offseason, although the Philadelphia Eagles flirted with one last year.

Every team deals with bad signings, big departures, questionable draft decisions and unresolved talent issues. The realities of the salary cap, the constraints on the supply and demand of player acquisition and the human factor in decision-making processes always lead to mistakes.

Below, we'll look at each NFL team's biggest offseason mistake, using the potential impact on that team's 2018 season as the guiding factor.

Arizona Cardinals: Cutting Tyrann Mathieu

The Cardinals can attempt to justify cutting Tyrann Mathieu by pointing to his history of injuries and an excessive cap number.