By win-loss records, there are three incredibly tight divisional races in the NFL after 10 weeks. In the AFC North, the six-win Ravens are just ahead of three teams with five wins. In the AFC West, the suddenly resurgent Chiefs are in a similar boat. On the other side of the league, the NFC South-leading Bucs have lost two straight in a division in which two wins separate them from the last-place Falcons.
Let's run through each of those races and identify what's driving them with seven weeks of the regular season left. As a spoiler, I'll note that ESPN's Football Power Index (FPI) doesn't think these races are quite as close as they seem by win-loss record.