The Eagles don't need a rebuild. They need a reason.

There is a particular quiet that settles over this city in the first week of September, and it is not calm. It is the sound of a fan base that has learned to expect winning and has not yet decided what to do with the expectation.

The roster is good. Everyone knows the roster is good. The front office has spent three offseasons proving it can keep a good roster good, which is harder than building one and gets none of the credit. Run it back is not a slogan here; it is an operating principle.

But a season needs a reason. Not a chip on the shoulder, this city has never lacked for chips, but an argument for why this year is different from the one before it. The last great Eagles teams all had one. Somebody was doubted. Somebody was owed. Something was unfinished.

The problem with being the favorite

Favorites drift. They win the games they should and lose the ones that require a little unreasonable belief, and by December they are 10-4 and nobody can quite say what the point was. That is the risk this season, and it has nothing to do with talent.

Run it back is not a slogan here. It is an operating principle. What it is not, on its own, is a reason.

So where does the reason come from? Watch the offensive line, which spent August getting called old by people who do not have to block anyone. Watch the second-year players who have been told all summer that they are the future and would like, this year, to be the present.

And watch Sunday the 13th. Not the score, the tone. A team that arrives with a reason plays the first quarter differently. It hits the first third down like it has been waiting nine months, because it has.

Rebuild the reason, not the roster. The roster is fine. The roster, frankly, is the least of anyone's problems, which in this city is the strangest sentence a person can write.