Mike Zimmer will officially be introduced as Cowboys defensive coordinator on Wednesday, taking over a key role on Mike McCarthy's staff. Here are three things the new defensive coordinator needs to do in his role in Dallas.

1. Make sure Micah Parsons is happy and relevant as a pass rusher.

2. Find bigger linebackers to cover tight ends and play with more physicality.

3. Coach with an edge and bring an old-school approach to the team.