The current head coach of the Philadelphia Eagles is in a class all his own ... but still has something to prove.

There was never a doubt the Philadelphia Eagles were going to extend Nick Sirianni, at least after a Super Bowl championship victory. With Sirianni headed into the final year of his contract, the Eagles rewarded their head coach with a multi-year extension that will keep him in Philadelphia for years to come.

A look at every Eagles head coach to get a contract extension — and why most of them didn’t last long after signing.