Miami announced the hiring after New England's season ended.
(02/04/19 Update) Patriots defensive coordinator Brian Flores is the new head coach of the Dolphins, the team announced Monday.
The news of the possible hire was first reported by ESPN's Adam Schefter. Miami waited until the end of New England's season before finalizing a deal with Flores.
Flores has been with the Patriots since 2004. He began as a scouting assistant, working as a defensive assistant since 2011. Flores was named New England's defensive coordinator in 2018 after Matt Patricia was named Detroit's head coach.
New England ranked No. 7 in points allowed per game in 2018. The Dolphins ranked No. 27 in the category, finishing second in the AFC East at 7–9.
Miami fired head coach Adam Gase on Dec. 31.