The Detroit Lions underwent some major coaching changes this offseason as two of the best offensive and defensive minds left the franchise. DC Aaron Glenn and OC Ben Johnson helped Dan Campbell turn the Lions from a losing team to one of the NFL’s top, but none of them will be on the field today for the Lions.
While Johnson left for a head coaching gig with the Chicago Bears, Glenn went back to the team that drafted him to the league in 1994. Let’s revisit what exactly happened.
Why Aaron Glenn Left The Detroit Lions?
Following his retirement from professional football, Glenn transitioned to coaching, starting his career with the Houston Stallions of the Texas Lone Star Football League, an indoor league based solely in Texas.
From there, he began his NFL coaching career with the Cleveland Browns in 2014 as an assistant defensive backs coach. He stayed in Cleveland until 2016, when he was hired on as the defensive backs coach for the Saints.
Glenn spent four seasons in New Orleans before becoming the Lions’ defensive coordinator in 2021. This role marked a significant step in his coaching career, as he was tasked with revitalizing a defense that had struggled in recent years. And under his leadership, the unit steadily improved, ranking among the league’s best in PFSN’s Defense+ metric during the 2024 season.
So if Glenn was so successful in Detroit, why did he leave? Ultimately, his departure was less about performance and more about opportunity. Every coordinator aspires to become a head coach, and for Glenn, the chance to take that next step with the franchise that drafted him was simply too good to pass up.
The New York Jets offered Glenn a five-year deal, tasking him with reshaping both the defense and offense following a disastrous 5-12 season. On paper, the roster upgrades looked promising, but the results have yet to materialize.
The Jets are down 0-3 to start the season, and frustration is building among the fans. However, Glenn remains adamant that this group is different.
“We’re not the same as what everyone says, ‘Same old Jets,'” Glenn said after losing 29-27 to the Tampa Bay Buccaneers in Week 3. “These guys (are) gonna fight no matter what the situation is. There’s no give up in them. I hate that term. I really don’t know what that term means, but I know this: they’re not the same old Jets. These guys are fighters. I love these guys.”
Glenn’s confidence will be tested in the weeks ahead, but his track record suggests he has the leadership to weather early setbacks. This new chapter represents both risk and reward for Glenn — a chance not only to prove himself as a head coach but also to redefine the identity of a struggling franchise.
