Dallas will need to find a new defensive coordinator for 2025, too. Mike Zimmer told Ed Werder that he would not return to the Cowboys and would likely retire.

Former Vikings head coach Mike Zimmer is likely to retire from coaching in the NFL, according to veteran reporter Ed Werder. Zimmer spent last season as the Cowboys' defensive coordinator under Mike McCarthy but is not returning to Dallas on new head coach Brian Schottenheimer's staff.

For some of those teams, that will involve finding new head coaches and/or General Managers. Three teams fired their head coaches during the season and two more have been dispatched as of 9 a.m. ET on January 6.

The Cowboys have tabbed Brian Schottenheimer as their 10th head coach in franchise history. How do the previous nine stack up? Here's how we ranked them.