Former Cincinnati Bengals Defensive Coordinator Mike Zimmer Expected to Retire

Former Bengals and Cowboys defensive coordinator Mike Zimmer won't return to Dallas next season.

Zimmer "will likely retire" according to Ed Werder. The former Vikings head coach spent six seasons as the Bengals defensive coordinator (2008-2013) under Marvin Lewis.

Zimmer was the Cowboys defensive coordinator last season. Dallas promoted offensive coordinator Brian Schottenheimer to head coach on Friday night.