The Miami Dolphins are hiring Green Bay Packers linebackers coach Sean Duggan as defensive coordinator, according to multiple reports on Sunday.
Duggan, 32, follows his longtime colleague, new Dolphins head coach Jeff Hafley, after they coached together at Ohio State, Boston College and Green Bay.
They were together for both of Hafley’s years with the Packers, with Duggan brought in as a defensive assistant in 2024 and promoted to linebackers coach in 2025 under Hafley as defensive coordinator.
Hafley was a head coach at Boston College, where Duggan had earlier played linebacker (2011-14) and later joined the coaching staff as a graduate assistant (2015), linebackers coach (2020-22) and co-defensive coordinator (2023).
Duggan also was an assistant at Hawaii, UMass and Ohio State, the latter in 2019 when Hafley was co-defensive coordinator and defensive backs coach.
Hafley said in January after he was hired by Miami that he plans to call defensive plays.
The personnel staffing movement from Green Bay to Miami also includes new general manager Jon-Eric Sullivan — who spent 22 seasons with the Packers — as well as Dolphins quarterback coach Nathaniel Hackett, defensive backs coach Ryan Downard and defensive quality coach Wendel Davis.
Duggan will replace Anthony Weaver, the Dolphins’ defensive coordinator for the past two seasons and a candidate in this year’s cycle for head coaching jobs. The last two hires reportedly are going to be Mike LaFleur for the Arizona Cardinals’ vacancy and Klint Kubiak for the Las Vegas Raiders’ post.
