Last season, the Dallas Cowboys' defense was a joke. It allowed 473 points, the most in franchise history.
There are many reasons the Cowboys' defense has now become a reason for optimism heading toward the postseason. A coordinator change to Dan Quinn helped a lot. Trevon Diggs became a Pro Bowl-level corner in his second season. But no rookie, on offense or defense, has made a bigger impact than Micah Parsons.
Parsons doesn't look like a rookie. He looks like an All-Pro. He had a play that took care of the Washington Football Team and virtually clinched the NFC East on Sunday.