NT is a hard position to evaluate. Because generally, a NT is doing his job, he has little stats to show. He is there to occupy the center and a G. He tries to keep a G off the ILB so the ILB is free to roam/stop the run.
Its unfair to Washington, bec. the Raiders surrounding defense (sans Burgess) is terrible. We have more talent around Fergy than Washington has. There run defense would be terrible even with Hampton, IMO, bec. they have no LB's worth mentioning.
That was the point of it. It would be like having Tom Brady with no OL. Brady cannot work miracles if he is given no protection. But surround him with a good OL, good things happen.
Same sort of deal with NT. Washington did his job. His teammates around him sucked.