Defensive coordinator Dan Quinn, not a healthy Dak Prescott, is the biggest difference between last season's Dallas Cowboys performance and this year's 2-1 start. 

The turnaround is staggering. 

Yes, Prescott is a legit Comeback Player of the Year candidate and easily a top-10 quarterback. Maybe he even enters the MVP conversation. He shredded the Philadelphia Eagles defense to the tune of an 80.8 competition percentage and three touchdowns during Monday's 41-21 victory. The Cowboys quarterback picked up right where he left off after last year's devastating ankle injury. 

"I think he's clearly playing better now. This is clearly a different football team," head coach Mike McCarthy told reporters after the game. 

But his return signaled what everyone already knew: The Cowboys' offense is already damn good. 

The same couldn't be said of the Dallas D, which ranked among the league's worst, particularly against the run. The unit played soft, undisciplined football under previous play-caller Mike Nolan. How bad was the performance? Through the first six games of 2020, only three teams in NFL history allowed more points.