
The defending NFC champion Philadelphia Eagles currently rank 27th in Defensive DVOA after finishing third last season, which isn’t good enough for anybody in the building. So, the team made the decision in mid-December to replace first-year defensive coordinator Sean Desai as a play-caller with senior assistant Matt Patricia, whose experience with the New England Patriots under Bill Belichick from 2004 through 2017 held some weight.
Or, the Eagles were just throwing stuff against the wall to see what would stick. At this point, either explanation is equally plausible.