The reports of Gannon's hiring come as Colts defensive coordinator Matt Eberflus continues to interview for head coach positions. Now Indianapolis will likely need an overhaul of its defensive coaching staff.
That's after a year in which the Colts finished with the eighth-best defense (332.1 yards allowed per game), including 241.6 passing yards allowed (20th). Indy also picked off 15 passes (tied for eighth) and gave up 24 passing touchdowns (12th) under Gannon's watch.
Conversely, the Eagles were one of the worst defenses at creating turnovers, with just eight interceptions. That will be one of the first areas for Gannon to address.
Now he ascends to one of the top assistant roles in a winnable NFC East.
As the Eagles begin to rebuild after finishing 4-11-1 under Doug Pederson this season, Gannon and Sirianni will team up to plot a course back to the top of the league.