If you forget about Peyton Manning, Matt Flynn, Tim Tebow and the rest of the quarterback drama that's taken place this spring, perhaps the biggest roster-movement story this offseason took place in Buffalo.
The Bills gave former No. 1 overall selection Mario Williams an enormous deal (six years, $96 million) to try and improve one of the NFL's worst pass rushes.
As the NFL transitions more and more to the passing game (teams regularly dropping back 40-50 times per game) defensive ends have come to command that type of money these days.
Of course rushing the passer is a defensive end's only area of responsibility, but it is their most important. And a great defensive end can either sack the quarterback, force a fumble or cause the passer to unload a bad throw resulting in an interception, each a potentially game-changing moment.
The 10 men on this list all excelled at their position.