Back to today’s briefing

Story perspectives

Dolphins' Jeff Hafley Names Sean Duggan Defensive Coordinator

2/1/2026

24 4

Summary

Story summary

Jeff Hafley, the new head coach of the Miami Dolphins, announced Sean Duggan as defensive coordinator.
Sean Duggan previously served as the Green Bay Packers linebackers coach and will work with Hafley for the fourth time.
At 32, he is the second-youngest NFL coordinator, and the Dolphins ranked 22nd in yards allowed per game last season.
Hafley will call defensive plays himself to ensure energy and detail.

1 of 1

Story summary

Jeff Hafley, the new head coach of the Miami Dolphins, announced Sean Duggan as defensive coordinator.
Sean Duggan previously served as the Green Bay Packers linebackers coach and will work with Hafley for the fourth time.
At 32, he is the second-youngest NFL coordinator, and the Dolphins ranked 22nd in yards allowed per game last season.
Hafley will call defensive plays himself to ensure energy and detail.