Capers served as the Miami Dolphins' defensive coordinator in 2007, while Caserio served as New England's wide receivers coach and O'Brien was a Patriots coaching assistant.
"I have known Dom for a long time and respect him tremendously as a coach, particularly defensively," said Bill Belichick. "To add a coach of his caliber is an outstanding opportunity for us. I look forward to getting to work with Dom and Dean [Pees] immediately."
The New England Patriots have hired veteran coach Dom Capers as special assistant / secondary, appointed Nick Caserio director of player personnel and named Bill O'Brien wide receivers coach.