Green Bay Packers linebackers coach Sean Duggan is expected to join Jeff Hafley’s staff in Miami, a move that would follow Hafley’s own departure and deepen the exodus of Green Bay assistants. The shift continues a personnel migration tied to the Miami Dolphins’ hiring of Hafley and the Packers’ front office changes this offseason.
Duggan, 32, rose through the college ranks to become a defensive assistant and then linebackers coach in Green Bay, working alongside Hafley in 2024 and 2025. His coaching résumé includes stops at Boston College, Ohio State, UMass and Hawaii, and he played linebacker at Boston College, giving him a background both as a player and a developing coordinator candidate.
The Dolphins are expected to hire Duggan as defensive coordinator with Hafley planning to call defensive plays, a structure that pairs Hafley’s schematic vision with Duggan’s positional and schematic chops. Miami’s new front office leadership has already assembled multiple former Packers staffers, and Duggan’s arrival would be the latest link in that chain as the franchise rebuilds its defensive identity.
For Green Bay, losing Duggan represents another disruption to a staff that already saw Hafley depart for Miami. The Packers must now replace a young coach who earned trust from players and colleagues for sound technique coaching, special-teams contributions and a steadying presence in the linebacker room during games and practices.
Green Bay Packers LB Coach Sean Duggan Leaves for Miami Dolphins
Duggan is set to join Hafley as the Dolphins’ new defensive coordinator. This is detailed more in a post shared by Tom Pelissero on X.
The Dolphins are expected to hire Sean Duggan as their defensive coordinator, per sources.
A former Boston College linebacker, Duggan coached with Jeff Hafley at Ohio State, BC and Green Bay. Now, at age 32, Duggan becomes Hafley’s DC in Miami. pic.twitter.com/TMUxBaoYio
— Tom Pelissero (@TomPelissero) February 1, 2026
Duggan’s promotion comes as Miami looks to shore up a defense that ranked poorly in key pass-rush and scoring metrics last season. The Dolphins’ investment in a coaching duo with a shared history underlines a desire for continuity in teaching methods and scheme implementation across levels of the staff.
The coaching carousel will have ripple effects on roster planning and player development in Green Bay, where interior staff continuity had been a hallmark of recent years. Green Bay’s next steps will include identifying internal candidates and scouring the market for assistants experienced in linebacker play and run-game schematics.
If the hire is finalized, Duggan will face the task of converting schematic ideas into improved on-field results while adapting to an NFL role with greater responsibility. For the Packers, it will be another offseason moment to rebuild the staff and maintain momentum under their remaining leadership.
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