Buffalo Bills Hire Jim Leonhard as New Defensive Coordinator

The rising star from division rival Denver Broncos takes over Bills' defense

Apr. 11, 2026 at 10:48pm

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A cubist, geometric illustration depicting fragmented, overlapping shapes and planes representing a football game or match, conveying the strategic and analytical nature of the Bills' new defensive coordinator hire.The Bills' new defensive coordinator brings a fresh, strategic approach to the team's coaching staff.Denver Today

The Buffalo Bills have hired Jim Leonhard, the current assistant head coach and defensive pass game coordinator for the Denver Broncos, as their new defensive coordinator. Leonhard, a former Bills player, is a 43-year-old rising coaching star who helped the Broncos boast the league's second-best total defense in 2025.

Why it matters

Leonhard's hiring is a significant move for the Bills as they look to bolster their defense and take the next step towards a Super Bowl. His experience developing defensive talent and recent success against the Bills in the playoffs could provide the strategic edge the team needs, though his past ties to a division rival may raise some concerns.

The details

Leonhard will be taking over the defensive coordinator role from Bobby Babich, who served in that position for the past two seasons. He'll be working alongside the newly appointed offensive coordinator, Pete Carmichael Jr., as part of new head coach Joe Brady's staff. Leonhard previously served as the defensive coordinator for the Wisconsin Badgers from 2017 to 2022, even stepping in as their interim head coach in his final year. His impact in Denver was evident, as he played a key role in the development of 2024 AP NFL Defensive Player of the Year Patrick Surtain II and helped the Broncos have the league's second-best total defense in 2025.

  • Leonhard is set to join the Bills as their new defensive coordinator on April 11, 2026.
  • He previously served as the assistant head coach and defensive pass game coordinator for the Denver Broncos since 2024.

The players

Jim Leonhard

A 43-year-old former NFL defensive back who is joining the Buffalo Bills as their new defensive coordinator after serving in the same role for the Denver Broncos.

Joe Brady

The new head coach of the Buffalo Bills, who is making significant hires to build his dream team.

Pete Carmichael Jr.

The newly appointed offensive coordinator for the Buffalo Bills, who will be working alongside Leonhard.

Bobby Babich

The outgoing defensive coordinator for the Buffalo Bills, who Leonhard will be replacing.

Patrick Surtain II

The 2024 AP NFL Defensive Player of the Year, whose development Leonhard played a key role in during his time with the Denver Broncos.

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What’s next

The Bills will be closely monitoring Leonhard's impact on the team's defense as they prepare for the upcoming 2026 NFL season.

The takeaway

Leonhard's hiring as the Bills' new defensive coordinator represents a bold move by the team to bolster their defense and take the next step towards a Super Bowl. His track record of developing defensive talent and recent success against the Bills could provide the strategic edge the team needs, though his past ties to a division rival may raise some concerns.