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Why the Chargers Chose Chris O'Leary as New Defensive Coordinator

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The Bolts delivered some big-time news Wednesday night by agreeing to terms with Chris O’Leary to be the Chargers next Defensive Coordinator.

O'Leary isn't a stranger around here, as he was on Chargers Head Coach Jim Harbaugh's staff in 2024 as the safeties coach.

O'Leary spent the 2025 season as Western Michigan's Defensive Coordinator and safeties coach, helping lead the Broncos to a 10-4 record with one of the stingiest defenses in the country.

Western Michigan ranked second in the Mid-American Conference in scoring defense (17.4 points per game), a mark that was also good for ninth in all the FBS.

And O'Leary's unit was also second in yards allowed per game (305.5) in the MAC and 19th in the country allowing 179.9 passing yards per game.

But don't think that one season away is what landed O'Leary this job.

In the lone year he was on staff, O'Leary was seen as a coach on the rise, with everyone from Derwin James to Elijah Molden to Tony Jefferson raving about the work he was doing in the secondary.

Remember, it was O'Leary who helped get Molden up to speed on the playbook when the safety was acquired in a trade just 10 days before the 2024 season opener.

The two spent hours and hours together — both in the facility and on the phone — in Molden's first days in powder blue so he could be ready to go.

Sure enough, Molden snagged a pick in Week 2 against the Panthers. And Molden also set career highs with three interceptions (3), seven passes defenses and two fumble recoveries in 2024.

The Chargers on Wednesday agreed to terms with Chris O'Leary to become their Defensive Coordinator.

O'Leary was also critical in James' resurgent 2024 season that saw the do-it-all safety earn All-Pro honors as he moved up in the box and played closer to the line of scrimmage.

O'Leary and James would work together on footwork and technique at the beginning of every practice. It led to James rediscovering his love for football.

"Even right now, I can't wait to come to work tomorrow," James told Chargers.com in December of 2024. "I'm having that much fun and it's exciting."

O'Leary played a key role in that resurgence of football passion for James.

O'Leary has 11 total seasons of coaching experience, only one of which came in the NFL.

But in a conversation with Chargers.com at the end of the 2024 season, it was clear he knew how to reach and impact players no matter what level he was at.

"I wouldn't say it's a lot different. It's football and it's finding ways to execute, finding ways to win games," O'Leary said. "The thing I've really enjoyed is just how hungry the players are on a day-in and day-out basis.

"There's not as much needed to poke and prod guys, they come ready to work every day for the last nine months. I've enjoyed that." O'Leary added.

Truth be told, that answer sounds a lot like something Jesse Minter would say.

Minter and O'Leary, by the way, had some overlap at the beginning of O'Leary's coaching career.

O'Leary was a graduate assistant at Georgia State in 2015 and 2016 when Minter was the school's defensive coordinator. The pair then linked up again in Southern California in 2024 when the Chargers led the league in points allowed per game (17.7).

O'Leary also spent six seasons at Notre Dame before landing with the Bolts.

Now, O'Leary will be tasked with maintaining the standard Minter — now the Ravens Head Coach — set the past two years.

But there's no reason to believe O'Leary won't succeed with the Bolts.

At the end of the 2024 season in that conversation with Chargers.com, O'Leary was asked about his coaching style on the field and in the meeting room.

His answer?

"My goal is to give the guys ownership," O'Leary said. "So, give the safeties ownership and try to motivate or inspire them to run with it and really become the leaders of the room.

"We've gotten to a point where I think they've really taken ownership of their success, their failures," O'Leary continued. "That will allow us to continue to ascend as the season goes. I would just say I lead them, but I try to take a step back and give them ownership of the room.

"Especially as they earn it and they can really take our room and our defense to great heights by themselves," O'Leary added. "I give them the tools, but I try to take a step back."

Take a look at the best photos from the Chargers 2025 campaign through the lens of manager of photography, Ty Nowell, seasonal photographer, Joaquin Torre, seasonal photographer, Cassandra Serrano, gameday photographers Noel Vasquez, Joey Hortiz, Katie Albertson and Jared Thomas.

O'Leary will likely take a more hands-on approach now that he's in charge of the entire defense.

But the nucleus of the Chargers defense is intact heading into the 2026 season, with James, Molden, Tuli Tuipulotu, Daiyan Henley, Teair Tart and Donte Jackson among the headliners who are under contract going forward.

Harbaugh has nailed his recent defensive coordinator hires of late, whether it was Mike Macdonald in 2021 at Michigan or Minter in college and the pros.

The Chargers Head Coach has a keen eye for coaching talent, and there's a reason he and the Bolts front office wanted O'Leary back at The Bolt after just one year away.

Even though it's only late January, the 2026 season already looks promising for the Bolts.

Mike McDaniel is the Chargers Offensive Coordinator while O'Leary is now in charge of the Bolts defense.

Late in the 2024 season, with the postseason looming, O'Leary was asked about what could lie ahead.

"We like where we're heading and we feel like we still got a lot to prove. That's where my mind is at," O'Leary told Chargers.com.

He'd probably give the same answer now that he's the new Chargers Defensive Coordinator.

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