NFL power rankings Week 4 roundup: The Chiefs’ streak ends Arrowhead PrideNFL Week 4 Power Rankings: Bills look like best team in football, take top spot Yahoo SportsNFL power rankings Week 4: Which 3-0 teams fall short of top five? USA TODAYNFL Top-10 rankings: Chiefs keep top spot, but Vikings right on their heels FOX SportsThe First Read: Buy or sell five surprise teams off to hot starts? Risers/sliders from Week 3; MVP rankings NFL.com