Miami Dolphins Defensive Coordinator
Quick Facts
- Role: Defensive Coordinator
- Team: [[Miami Dolphins]] (MIA)
- Current holder: Sean Duggan
- Coaching tree: Packers/Hafley branch; see [[Coaching Trees]]
Background
Duggan spent one season as a co-DC in college (Boston College, 2023) and just two years in the NFL — a Packers defensive assistant in 2024, then promoted to linebackers coach in 2025. Last season he helped Quay Walker, Edgerrin Cooper, and Isaiah McDuffie combine for 338 tackles. Familiar with new HC Hafley from their Packers time. Play-calling stays with Hafley, so Duggan manages the rest.
Scheme and Tendencies
Zone-heavy 4-3 base in concert with Hafley. Low blitz rate, low man-coverage rate, more cloud coverage.
Recent News
- 2026 — Hired as Miami DC under Hafley ([[Dolphins reboot with Hafley HC, Slowik OC, Duggan DC for 2026 draft]])
Sources
- [[Dolphins reboot with Hafley HC, Slowik OC, Duggan DC for 2026 draft]]
- [[Full list of 2026 NFL coordinator grades from CBS Sports]]