It's official: the Green Bay Packers are hiring Jonathan Gannon to be the team's new defensive coordinator. Gannon will replace Jeff Hafley, who was hired to be the head coach of the Miami Dolphins last Monday. Gannon will be Matt LaFleur's fourth defensive coordinator in eight seasons.

The Packers chose the 43-year-old Gannon over other interviewees Al Harris, Daronte Jones, and Christian Parker. It was reported that the Packers also had interest in Jim Leonhard and Raheem Morris, but they opted to move forward with Gannon rather than wait. It was also reported that Gannon had other options available, including interest from both Jim Harbaugh and John Harbaugh.

Gannon comes to Green Bay with plenty of NFL experience, including seven years coaching defensive backs, two years as a defensive coordinator, and three years as an NFL head coach. Per Rob Demovsky of ESPN, Matt LaFleur "loved the fact that Gannon has sat in the head coach's chair," which LaFleur also appreciated when he hired Jeff Hafley.

A big hire for the Packers, who lost Jeff Hafley to Miami. Jonathan Gannon had options and chose to team up with Matt LaFleur in Green Bay. https://t.co/e59rXWoIos pic.twitter.com/R2H1zcVPbl

— Tom Pelissero (@TomPelissero) January 25, 2026

Gannon most recently served as the head coach of the Arizona Cardinals, but was fired at the end of the regular season. His tenure in Arizona was underwhelming, to say the least. His teams went 15-36, never won the division, and never made the playoffs. His teams finished with three straight losing seasons and went 3-15 against other NFC West teams. To top things off, Gannon was fined $100,000 by the NFL for a sideline altercation with one of his players.

Before Gannon's stint in Arizona, he served as the defensive coordinator for the Philadelphia Eagles. He helped the team reach a Super Bowl birth in just his second season. His defense that season finished top-five in DVOA, EPA/play, and passing yards against. They also produced 70 sacks, 17 interceptions, and 15 forced fumbles. It was a defense loaded with talent, but Gannon helped unlock it.

Despite signing his recent extension, LaFleur essentially has a two-to-three-year window to get the Packers to the next level. That makes this arguably the most crucial hire that Matt LaFleur has had to make. He knows the weight this hire carries. If Gannon flops and it turns out to be the wrong choice by LaFleur, he knows he won't be around to make another one. Gannon might end up being a fantastic coordinator. He could also end up being a bust. No one will know for quite some time. Either way, let's take some time to get to know the new play caller for the Packers' defense.

Gannon's Rise Up the Ranks

Gannon's coaching career started earlier than most. He started at the University of Louisville, but he was there to play, not to coach. He was a safety, and a good one. Gannon, unfortunately, suffered a hip injury that effectively ended his playing career. Josh Weinfuss of ESPN shared a story that after Gannon woke up from a major hip surgery, the surgeon told him that he wasn't going to play football again. Gannon didn't give up on football, though. He became a graduate assistant under Bobby Petrino, and that jump-started his coaching career.

In 2007, Petrino transitioned to the NFL and became the head coach of the Atlanta Falcons, and he brought Gannon with him. Unfortunately, that season was a nightmare. It was the same year that Michael Vick was indicted and sentenced to prison time. The one positive from that season was that it allowed Gannon to work with Mike Zimmer, Emmitt Thomas, and Joe Whitt Jr. Gannon made a strong impression during his time with the Falcons. St. Louis Rams general manager Billy Devaney, who worked with Gannon in Atlanta, wanted to hire Gannon in St. Louis. The Rams didn't have any coaching positions open at the time, so Devaney decided to hire him as a scout instead. Scouting wasn't Gannon's expertise, but he was still good at it. "If he wanted to stay on the personnel side, he'd probably be a general manager by now," Devaney said. Gannon ended up working closely with Brad Holmes, the current general manager of the Detroit Lions, and became close friends with Josh McDaniels, who is now the offensive coordinator for the New England Patriots.

Despite being good at his scouting job, Gannon wanted to coach, and his next opportunity to coach came in 2012 with the Tennessee Titans. Gannon worked under head coach Mike Munchak and defensive coordinator Jerry Gray. As a Gannon defensive quality control coach, he shared an office with Arthur Smith for two seasons. He also had the opportunity to learn from Gregg Williams for one season, who was on staff as a senior defensive assistant. After two years in Tennessee, Gannon rejoined Mike Zimmer and Jerry Gray as the assistant defensive backs coach for the Minnesota Vikings. While most of Gannon's work was with the defensive staff, he also worked with some notable offensive coaches, including Norv Turner, Drew Petzing, Klint Kubiak, Kevin Stefanski, Pat Shurmur, and Tony Sparano.

Nick Sirianni had the 𝙩𝙞𝙢𝙚 for Jonathan Gannon detractors 😂😭 pic.twitter.com/OSAihStMgg

— NBC Sports Philadelphia (@NBCSPhilly) January 22, 2023

Gannon's next chance to move up came with the Indianapolis Colts. Gannon worked as the defensive backs coach under head coach Frank Reich and defensive coordinator Matt Eberflus for three seasons, but it was Josh McDaniels who connected Gannon with Indianapolis. It was Gannon's first time working with Matt Eberflus, who had a much different style than Mike Zimmer. Gannon also worked alongside Nick Sirianni. When Sirianni became the head coach of the Philadelphia Eagles in 2021, he brought Gannon with him to be his defensive coordinator. It was Gannon's first opportunity to design and call his own defense. "I think his football IQ is off the charts," Sirianni said about Gannon. "When I wanted to know something about a defense, he's the first one I went to. His players play well for him, and his energy is contagious." Sirianni also said, "This guy is an incredible coordinator. People love to play for this guy. He's going to be a head football coach in the National Football League because of what he does. This guy is a stud. He's a stud."

Gannon was only the defensive coordinator in Philadelphia for two seasons, but his strong performance landed him a head coaching job with the Arizona Cardinals in 2023. Gannon stayed with the Cardinals for the last three seasons, but the lack of winning led to his dismissal. One positive that came from his time in Arizona is that Gannon got to know Drew Petzing very well. Petzing was Gannon's offensive coordinator and is now the offensive coordinator for the Detroit Lions. Gannon will get to face off against him twice per season. Another notable name who worked with Gannon is Nick Rallis. Rallis served as Gannon's defensive coordinator and defensive play caller. He has experience coaching linebackers and could be a candidate to join Gannon in Green Bay if Sean Duggan leaves.

Gannon's Scheme or Lack Thereof

"I don't have a scheme."

Sound familiar? Gannon made some waves when he made this bold statement in Philadelphia, but it shouldn't come off as alarming because it's very similar to what Jeff Hafley said when he first got to Green Bay. “When I got here, I didn't say, ‘Hey, this is what we're running.' If you actually ask the head coach, when we first talked about this when he interviewed me, it was, ‘Hey, what scheme are you going to run?’ I said, ‘I don't have a scheme.’ I believe that you have to be adaptable," Gannon shared. "The first thing is we've got to figure out what our players can do, and then we've got to put them in those situations as much as possible to utilize their strengths. The main thing for us is, it's not what we play. It's how we play.”

It's hard to know exactly what Gannon will run in Green Bay because he's only been a defensive play caller once before. His scheme and philosophy have evolved and adapted over time. He started under the aggressive-minded Mike Zimmer. Zimmer liked to blitz, play press-man coverage, and present a lot of single-high safety looks, but that's not something Gannon did much of in the past. Then Gannon learned under Matt Eberflus, who usually had a "bend but don't break" philosophy. He ran very zone-heavy coverages and blitzed minimally. Gannon is probably going to run something similar in Green Bay.

A year ago, @The_Coach_A called Gannon's the "NFL's most unpredictable defense."

This is what the Packers will run schematically moving forward: https://t.co/CVebm3yPQJ

— Wendell Ferreira (@wendellfp) January 25, 2026

The Packers' organizational philosophy seems to be the "bend but don't break" approach. They want to limit explosive plays and force teams to dink and dunk their way down the field. That's something Gannon has done in the past. He ran a very Vic Fangio-like system in Philadelphia. There were a lot of four-down linemen looks with match-quarter coverage. His defenses in Arizona were different from that, although it should be noted that he didn't call the plays. They ran a lot of Cover-4, but they operated as more of a hybrid defense with a lot of three-safety personnel. Gannon will now inherit a defensive unit that possesses a lot of individual talent, namely Micah Parsons, Edgerrin Cooper, and Xavier McKinney. Whether he operates out of a 3-4 base or a 4-3 base doesn't matter; Gannon just needs to find ways to unlock his best players. He doesn't have a stable of pass rushers who can all win one-on-one matchups other than Micah Parsons, and he doesn't have the cornerbacks to play physical man-to-man coverage on the back end. He will probably need to use a lot of zone coverages and generate pressure schematically. 

"Our scheme should be to put our 11 guys on the field in the best position possible to succeed."

Looking Ahead

Is Jonathan Gannon the right person to lead the Packers' defense moving forward? No one knows, and no one will know for quite some time. The reality is that the Packers expect to be competing for a Super Bowl within the next couple of years, so they decided to hire an experienced coach who can make an immediate impact. LaFleur wanted someone who could be the "head coach" of the defense; someone he wouldn't have to constantly monitor. Gannon gives the Packers exactly that. He has experience coordinating a championship-caliber defense, and the Packers are hoping he can bring that same success to Green Bay.

Matt LaFleur has never worked with Gannon before, and they don't have too many coaching connections, but he's respected Gannon from afar. “Gannon, I think, does a hell of a job,” LaFleur said last season. “Rallis does a hell of a job. Those guys are really good coaches.” LaFleur also added, "From an offensive standpoint, it was a very frustrating day overall in regards to what they did a hell of a job of keeping an umbrella on the defense. There weren’t many looks where we could throw the ball down the field...Give credit to them. I got a lot of respect for those guys.”

Packers fans: You’re getting a really solid dude in Jonathan Gannon. It didn’t work out here in the desert, but he should be able to do some fun things with Micah Paraons and the rest of that crew.

— Donnie Druin (@DonnieDruin) January 25, 2026

It's easy to be uninspired by the hire of Gannon. He doesn't have a ton of experience calling a defense. In addition, his tenure in Arizona was not pretty. The Cardinals struggled to win games, and the defense often struggled, which shouldn't really happen for a head coach with a defensive background. Gannon didn't call plays for the defense, but he also didn't make any changes to take over play-calling duties when things were going south. Football aside, he comes off as a different dude. Whether it be the awkward clips circulating on social media, punching his player after a mistake, or yelling at opposing fans from his car window, he's done some questionable things. The apprehension is valid. But if Gannon is successful, none of that will matter.

The Packers' defense has its fair share of deficiencies, but accountability seemed to be lacking at times throughout the season. There were far too many times when players would have a bust in coverage or an undisciplined penalty, and it ended up costing the team. Luckily, Gannon is a strong believer in accountability. "Player accountability is simply this: You have to define what winning behavior is and hold people to that standard," Gannon said. "Accountability is not just a negative. It's a positive too. When people do the right thing, that is winning behavior … as hard as we are going to be on our guys, we're going to love 'em up even more. That's how you win games." Here's to hoping Gannon brings that exact mindset to Green Bay.