Someone Who Knows told me a major roadblock to Steve Spagnuolo taking the defensive coordinator job in Philadelphia was the presence of very strong personality Jim Washburn on the defensive line.
This doesn’t surprise me. The Wide Nine was always a red herring in talks about whether a new coordinator would be compatible with Washburn. The bigger issue is that a new coordinator would have to cede all control of the line to his supposed underling. Remember, Washburn doesn’t take orders from anyone.