NFL Week 4 winners, losers: Eagles and Chiefs impress; Ravens regress - USA TODAY

We're already one month into the 2022 NFL season so storylines and team identities are starting to crystalize.

For one, it's clear a couple of teams in the AFC are starting to separate themselves from the rest of the pack: the Kansas City Chiefs and Buffalo Bills each picked up massive victories Sunday, while the Baltimore Ravens — the team Buffalo toppled — blew another big lead.

Still, there is only one undefeated team left standing: the Philadelphia Eagles, who had to overcome a sluggish start to get to 4-0.