Each week throughout the season, we will break down ESPN's NFL Power Rankings from the perspective of ESPN's Football Power Index (FPI) to determine which teams are ranked too high and too low, and why.

As a reminder, the ultimate goal of the NFL FPI is to measure team strength and project performance going forward. Each year, there are teams that are better than their records suggest and others that are overrated based on their win total. This is often a result of a lot of close wins/losses, luck or schedule. Because FPI looks at a team's per-play efficiency rather than its win total, it can uncover the teams that are most overrated and underrated and project which teams will be strongest going forward.