An NFL site identified the "backbone" of the Kansas City Chiefs' recent Super Bowl runs, and it's defensive coordinator Steve Spagnuolo.

The Kansas City Chiefs veteran has been overtaken in ESPN's yearly ranking of the best interior defensive lineman in the NFL.

New York Giants star Dexter Lawrence climbed to the top of the annual defensive tackle rankings from ESPN's Jeremy Fowler.

The Arizona Cardinals gave Nick Rallis, their defensive coordinator for the third straight year, a lot of help this offseason ...

Other NFL team previews: 32. Titans | 31. Saints | 30. Browns | 29. Panthers | 28. Jets | 27. Giants | 26. Raiders | 25. Patriots | 24. Colts | 23. Dolphins | 22. Jaguars | 21. Falcons | 20. Steelers ...