The Eagles have not confirmed the hiring, but the Eagles also haven't commented on any of the numerous coaching hires since Chip Kelly became the head coach.
Davis's coaching career includes two stints as a defensive coordinator. He worked with the Arizona Cardinals in 2009 and 2010, where his units ranked 14th and 30th in points allowed.
With the San Francisco 49ers in 2005 and 2006, his defenses ranked 30th and 32nd in points allowed.
So, it's not exactly a stretch to say that Davis has a very spotty resume as a defensive coordinator.
His other work has included: defensive assistant with the Pittsburgh Steelers (1992-1994), outside linebackers with the Carolina Panthers (1995-1998), defensive assistant/linebackers with the Cleveland Browns (1999), defensive assistant/defensive line with the Green Bay Packers (2000), linebackers with the Atlanta Falcons (2001-2003), linebackers with the New York Giants (2004) and linebackers with the Arizona Cardinals (2007-2008).
His specialty, obviously, is working with linebackers.
In Carolina, Kevin Greene led the NFL in sacks in 1996, while linebacker Lamar Lathon finished second with 13.5 sacks. In Atlanta, he helped linebacker Keith Brooking earn three straight Pro Bowl selections. And with the Giants in 2004, he called the blitz packages, something usually reserved for the defensive coordinator.
With the Eagles, Davis will reportedly run a 3-4 defense. He has operated both throughout his coaching career.
He becomes the team's fifth defensive coordinator in the last three-and-a-half years.
Jim Johnson, the defensive coordinator from 1999 to 2008, died from cancer in July of 2009. Sean McDermott worked as the defensive coordinator in 2009 and 2010. Offensive line coach Juan Castillo served as the defensive coordinator in 2011 and the first six weeks of 2012. Defensive backs coach Todd Bowles was promoted to defensive coordinator, but was fired at the end of the season after the Eagles intercepted exactly one pass in his 10 games as coach.
The Eagles had also been reportedly interested in Alabama defensive coordinator Kirby Smart, Georgia defensive coordinator Todd Grantham, Ravens linebackers coach Todd Monachino and San Francisco 49ers defensive backs coach Ed Donatell.
Davis's father, Bill Davis, worked for the Eagles under head coach Buddy Ryan, but was forced to resign after a power struggle in 1989.