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.

After the Chicago Bears hired Ben Johnson to be their next head coach after firing Matt Eberflus, it didn’t take long for the rest of the coaching staff to fill out. Johnson started by grabbing a few familiar names from the Detroit Lions coaching staff — including receiver coach Antwaan Randle El.

We spoke with John Sigler of Saints Wire to give us a rundown on what we can expect from new Bears defensive coordinator Dennis Allen.