Reich joins the staff of new Eagles coach Doug Pederson, who was officially hired on Monday.
Reich, who has spent the last two seasons in San Diego as the Chargers' offensive coordinator, played quarterback in the NFL for 13 years and retired in 1998.
His coaching career began in 2006 as a coaching intern for the Colts. In 2008, he was named an offensive assistant, and he stayed in that role with Indianapolis until he became a wide receivers coach with the Arizona Cardinals in 2013. In 2014, he joined the Chargers as the quarterbacks coach.
Reich is best known for leading the largest comeback in NFL history in 1993, when he led the Buffalo Bills to a 41-38 postseason overtime victory after trailing 35–3.
On Tuesday, the Eagles hired Jim Schwartz to be their defensive coordinator.
In 2015, the Eagles missed the playoffs for the second consecutive season, posting a 7-9 record under former head coach Chip Kelly. After being fired by the Eagles, Kelly signed a four–year, $24 million deal to coach the 49ers.