Matt Eberflus was 40 when he joined the Dallas Cowboys as a linebackers coach in 2011. He had two years of experience as an NFL assistant coach with the Cleveland Browns and stayed with Dallas until 2018.

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.

In his new introduction and re-introduction to Dallas on Tuesday, Eberflus said his goal for Dallas’ defense is ‘pretty simple.’