The Defense and its improvement. Why?

[bobblehead]

Matthews now causes more confusion than ever before. The defense was better when they flipped him between right and left for a while; now he can show up anywhere.

With Matthews in the middle, he has an impact to some extent on almost every running play, he is that fast and that good. Even if he is not involved in the tackle, he takes up blockers. He attracts attention and takes it away from others.
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This and this and this. I made enemies when I said Clay was over rated as a pass rusher in the past, but what he does is EVERYTHING. Our ILB play was so abysmal, and when you are soft up the middle, you are soft everywhere. When Clay moved inside last season it was night and day. He solves every problem. Covering TE's and backs out of the backfield. Check. Shutting down the run game. Check. Unpredictable pass rusher who can come from inside, outside, crossing. Check.

In short, our 3-4 D has found its version of Ray Lewis or Patrick Willis. Of course, the improvements of Perry, Neal and addition of Peppers has also helped the pass rush immensely which makes all DB's look better. But mainly its Clay in and Hawk out.