I think in many ways, the Seattle Seahawks and Philadelphia Eagles have been intrinsically tied to one another over the last five or six seasons. The only difference is that the Seahawks have been much more successful during that period of time, but those results might only be the product of a few very key decisions during those years.
Both teams hired new GMs in 2010 — John Schneider (and Pete Carroll) in Seattle, Howie Roseman in Philadelphia.
Both teams hired college head coaches from the Pac-12 — Carroll for the Seahawks and Chip Kelly for the Eagles.