'Frank Reich, Buffalo's former backup quarterback, has been linked to the job in the past. He interviewed for the Bills' head coaching vacancy in 2015 after Doug Marrone opted out of his contract with the team. Reich is currently the Philadelphia Eagles' offensive coordinator. The Eagles have scored 22.7 points per game with a rookie quarterback, Carson Wentz, running the offense. Before joining the Eagles, Reich served as offensive coordinator of the Chargers from 2014-2015.'