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NFL head coaches are some of the best minds in professional sports. They climb through the ranks to emerge as one of the 32 most elite in their profession, obviously no easy task. Once they get the head job, some of these men like Don Shula or Bill Parcells rise to Hall of Fame levels as they guide their teams to multiple championships. And yet, not everything is always such smooth sailing.

Even for these surefire Hall of Famers, spectacular failure lurks around every corner. It doesn’t matter if you’re Bill Belichick or Joe Gibbs. Sometimes a decision you make is going to come back to haunt you at the worst possible time, creating moments that fans will remember forever. From “Red Right 88” to “Spygate,” these are the 25 Biggest Coaching Fails in NFL History.