Trying to find a coach to lead your team can be a very difficult task for an NFL franchise. Selecting a head coach is likely a more daunting task than bringing in a quarterback to lead your team.
The head coach is responsible for running practices, drawing up game plans, and maintaining chemistry amongst his players.
Obviously, a head coach can't do everything, thus the reason for assistant coaches. However, when things go wrong, they are the ones who have to take the blame.
From Bobby Petrino to Jim Zorn to Lou Holtz, here are the most worthless coaches in NFL history.