ESPN's Football Power Index rankings for Oct. 13

Below are the ESPN Football Power Index rankings for Oct. 13, after Week 5 of the 2015 NFL season. For a full explanation on how the FPI is put together, please read this explainer. For more background, you also can read this Q&A.

A few notes heading into Week 6:

The Philadelphia Eagles are 2-3 and in a three-way tie for second place in the NFC East (which equates to a three-way tie for last), but they rank fourth in ESPN’s FPI. The Eagles rose two spots after their 39-17 win over the New Orleans Saints on Sunday.

Despite the Eagles scoring 39 points, FPI judges defense as the team’s strength and the second-most powerful in the NFL, behind that of the Jets. It is predicted to add about four points per game to its net scoring margin.

The Pittsburgh Steelers made the biggest jump in FPI rankings after their last-second win over the San Diego Chargers on Monday Night Football, rising from 10th to sixth on an improvement of 1.1 in their FPI rating.

An overtime loss to the Cincinnati Bengals gave the Seattle Seahawks a slight increase in FPI (0.1), but the Seahawks dropped a spot to fifth in the FPI rankings.

The Denver Broncos remained undefeated, but they dropped 1.1 in FPI (and fell three spots in the rankings to 11th).

The top three teams – the New England Patriots, Arizona Cardinals and Green Bay Packers – remained the same in FPI after victories Sunday. The Patriots and Cardinals are well ahead of the Packers, with more than a three-point difference in FPI separating No. 2 and No. 3.