Daboll, who began his NFL coaching career in 2000 with the Patriots and was with the team through the 2006 season, will reunite with several former coaching colleagues, including offensive coordinator Josh McDaniels.
The 37-year-old Daboll started his work with the Patriots as a defensive assistant during the 2000-2001 seasons before moving to a role as wide receivers coach, which he held from 2002-2006.
Daboll was hired by Eric Mangini when he took the head-coaching job with the New York Jets in 2007, serving as his quarterbacks coach for two seasons. Mangini, who also worked his way up the NFL coaching ladder with the Patriots, brought Daboll with him to the Cleveland Browns in 2009 when he was named the coach there, and Daboll was tabbed as his offensive coordinator, a position he held for two seasons.
Daboll served as the Dolphins' offensive coordinator during the 2011 season, and most recently as the Chiefs' offensive coordinator during the 2012 season.
The Patriots reunited with a former assistant during the playoffs last season as well, as McDaniels was hired after being released from his contract with the St. Louis Rams. He was brought aboard as an offensive assistant before replacing Bill O'Brien as the offensive coordinator when he took the head-coaching job at Penn State.
"It's great to have Brian back," McDaniels said. "He's a very good football coach. Very knowledgeable. Can certainly and will certainly help us in probably a lot of different ways. Certainly having another set of eyes that have experience and a lot of understanding of our system and how we go about doing things is only a positive for us and can help our football team going forward. I look forward to doing that with Brian.
"Last year when I came back, just really did anything they asked me to do. I was excited to do it. Anything you can do to help at this time of year is useful. Whether that's drawing practice cards or sitting in a meeting and having a few ideas on a certain situation in a game plan or anything like that during the course of a week, everything is so important. Every detail is so critical at this time of the year, and having another good football coach on your staff to help is nothing but helpful for us."
McDaniels was a target for teams this offseason who have worked to fill their head-coaching vacancies, but despite the interest, turned down interview requests to remain with the Patriots.
"This should be hopefully a very simple transition for (Daboll) to come back here and fit in with all of us," McDaniels said. "I know all of us are excited to see him and have him help out here this week and see how many different ways he can help us get better. I'm excited to be here and like I said before, I'm very happy with my role here."
Adding Daboll brings the Patriots another offensive mind familiar with their system, and one who can work with several positions. The Patriots face the Baltimore Ravens in the AFC Championship Game on Sunday.