Three reasons the Lions' defensive line will be one of the NFL’s best:

1. Rotation in the middle with the addition of rookie Nick Fairley will keep the defensive tackles fresh from start to finish. Is there another NFL team that has such depth at tackle — Ndamukong Suh, Corey Williams, Fairley and Sammie Hill who quietly had a solid season last year.

2. Kyle Vanden Bosch. He’s a monster and he makes the team better even if he’s on the sidelines. But when he’s on the field, he’s big trouble for the opponent.

3. Cliff Avril had his breakout season last year, his third in the NFL and with the Lions. It’s no coincidence that he had Vanden Bosch there to set an example.

(Follow me on Twitter @PaulaPasche. Will offer daily lists of threes through July 22. Tell your friends. Let me know if you agree or not.)