Jim Leonhard, the Architect Behind What Many Considered the NFL’s Best Defense Last Season, Reportedly Arrives in Buffalo and Proposes a Plan to Move On From Two Defensive Cornerstones While Presenting a Long-Term Vision — Terry Pegula’s Response Surprises the NFL

 A new defensive era appears to be quietly taking shape within the Buffalo Bills organization.

And it has begun in a way that few around the NFL could have anticipated.

According to recent reports from Adam Schefter and multiple league sources, Buffalo has identified its preferred candidate.

The Bills are reportedly targeting Jim Leonhard for the defensive coordinator position under new head coach Joe Brady.

Leonhard currently serves as the Denver Broncos’ defensive backs coach and passing game coordinator.

He also has a unique connection to Buffalo, having spent two separate stints with the Bills during his playing career.

Sources indicate that Leonhard recently presented a comprehensive vision for the future of Buffalo’s defense.

Included in that proposal was a roster restructuring plan that immediately drew significant attention from the team’s leadership.

Notably, the recommendation comes at a time when Buffalo is reportedly exploring ways to re-sign both Matt Milano and Joey Bosa as part of its strategy to maintain the core of its defensive unit.

According to reports, the proposal recommends that Buffalo move on from two key defensive contributors.

The two players identified are veteran linebacker Matt Milano and edge rusher Joey Bosa.

According to the evaluation, the recommendation is based on the need for future salary-cap flexibility as well as projected on-field performance.

In Milano’s case, the primary concern centers on his contract structure and the organization’s long-term financial planning.

His current deal is expected to run through the 2025 season, potentially creating a significant dead-cap charge in 2026.

The assessment also references Milano’s injury-affected 2025 campaign and concerns about inconsistent performance.

Leonhard reportedly believes that the financial investment required to retain Milano may no longer align with the value he is expected to provide on the field.

A similar conclusion was reportedly reached regarding Joey Bosa and his long-term role on the roster.

After showing promising signs early in the 2025 season, Bosa’s effectiveness as a quarterback disruptor reportedly declined significantly over the remainder of the year.

During what has been described as a private meeting, Leonhard reportedly delivered a strong message emphasizing accountability and the organizational changes he believes are necessary.