Dennis Allen—who was introduced as Chicago's next defensive coordinator at a press conference on Thursday—revealed that Johnson reached out to him during the season to see if

The reason: he was Johnson once. Allen, the Bears ’ new defensive coordinator, was a 39-year-old first-time head coach when the Raiders started their 2012 regular season. Johnson will be 39 when the Bears play their first game with him as their head coach.

The coordinators hired by Chicago Bears coach Ben Johnson enter their new jobs with vastly different amounts of coaching experience. Defensive coordinator Dennis Allen has had two stints as an NFL head coach while new offensive coordinator Declan Doyle is the youngest coordinator in the league.