NFL power rankings Week 4: Who takes over No. 1 spot after Seahawks' first loss?

1. Buffalo Bills (2): If you had a Nickel (City) every time they won while turning over the ball five times … you'd have, like, a dime. The still-unbeaten Bills have the reverse lights on while backing into the top spot on the heels of a performance when QB Josh Allen had three giveaways. The Bills are 3-0 for the third straight year but should probably beware the reeling Patriots , the next visitors to the new Highmark Stadium.

2. Kansas City Chiefs (5): RB Kenneth Walker III is averaging a league-best 120 rushings yards per game while continuing to give every indication he's unlocked the AFC's top-ranked offense anew. Next, a battle for first place in the AFC West at Las Vegas , where QB Patrick Mahomes is 6-0.

3. Seattle Seahawks (1): Without RB Kenneth Walker III, they've failed to crack 100 yards rushing in two of their games – including a meager 44 in Sunday's loss at Washington. As efficient as the passing game has been, rookie RB Jadarian Price and Co. need to pick it up a notch before defenses start routinely bracketing Jaxon Smith-Njigba . Still, the "Dark Side" D is in full effect, currently the only one in the league permitting fewer than 250 yards per game.