The New York Jets decided to hire Aaron Glenn as their next head coach, and the Green Bay Packers couldn't be happier with this outcome. At first, you might think the Packers have nothing to do with this, but there are actually multiple reasons for Green Bay to be happy and relieved.

Jeff Hafley is staying around

The first and most impactful benefit is that defensive coordinator Jeff Hafley was not the option. He interviewed for the Jets head coaching position late last week, and losing Hafley after just one season when the Packers evolved so much would be scary.

There were some good options to replace Hafley, for sure, but it's tough to say if things would work out. After missing on Mike Pettine and Joe Barry, head coach Matt LaFleur finally found a defensive coordinator to match his creative style.

Hafley could theoretically still leave the Packers, since the Las Vegas Raiders, Jacksonville Jaguars, Dallas Cowboys, and New Orleans Saints are still looking for a head coach. However, the Jets were the only ones who interviewed Jeff Hafley.

For now, the defensive coordinator is staying around—but if his 2025 season is as successful as 2024, it's hard to think he will be in Green Bay for much longer.

Packers vice president of player personnel Jon-Eric Sullivan had also interviewed for the Jets GM job. Sullivan is still in contention, but the Jets' decision to hire Glenn is an indication that Washington Commanders assistant GM Lance Newmark will get the job.

The other positive

Beyond allowing Jeff Hafley to stay, the Jets' decision to hire Aaron Glenn makes things way more difficult for the Detroit Lions, an NFC North divisional rival.

The Lions had already lost offensive coordinator Ben Johnson, as he went to the Chicago Bears—this later part is not so positive.

Now, Dan Campbell will have to rebuild his coaching staff. While it's feasible, recent history tells us that it's something difficult to accomplish. Even good coaches like John Harbaugh and Mike Tomlin had tough experiences replacing coordinators.

In 2023, the Philadelphia Eagles had a challenging time replacing both Shane Steichen and Jonathan Gannon. Even though a talented roster was 11-6, it got worse down the stretch, losing 32-9 in the wild card round, and it almost cost Nick Sirianni his job. After just one season, both Brian Johnson and the Sean Desai/Matt Patricia combo got fired—gladly for the Eagles, they were able to find better options in 2024 with Kellen Moore and Vic Fangio. But it's not an automatic process.

For a CEO-type head coach like Dan Campbell, good playcallers are extremely valuable. Early in his tenure, the offense (and quarterback Jared Goff in particular) did not work out with Anthony Lynn, leading to the promotion of Ben Johnson. The roster is much more talented now, but losing the offensive and defensive coordinators in a two-day stretch is a challenge for anyone.

Packers coaching and front office tracker: Updates, news, and rumors on where Jeff Hafley, Adam Stenavich, and Jon-Eric Sullivan could wind up

There are a lot of things going on in Green Bay