We're months removed from his chaotic time coaching the Chicago Bears, and it's still impossible to overstate Matt Eberflus's disastrous work with the NFL's charter franchise. He didn't know how to use timeouts.

Eberflus came to the Cowboys in 2011 working in a 3-4 defense under Rob Ryan. He left following the 2017 season after working in a 4-3 scheme under Monte Kiffin and Rod Marinelli. In his last two seasons, he served as the passing game coordinator and worked alongside Marinelli in many ways.

Dallas' new defensive coordinator carries a well-earned reputation for safe playcalling. Whether or not that's a winning formula depends on more than just him.