"Dom Capers is one of the most respected defensive coaches in the game today, and he has been for many years," Jaguars head coach Doug Marrone said in a statement, via the team's official website. "His defenses have long been among the most effective and productive in the NFL. He has career experiences and accomplishments that will benefit our coaches and our players. He adds a unique perspective and veteran presence that will be valuable assets to immediately help us. I look forward to working with Dom and having him on our staff."