As the NFL reaches Week 5, teams are beginning to find their identities, but one major concern is becoming increasingly apparent: defensive struggles. In this week’s power rankings, even some of the top teams are facing serious questions on the defensive side of the ball, causing significant shifts in the rankings.

At the top of the list, teams like the San Francisco 49ers and the Kansas City Chiefs remain dominant, but even they have shown vulnerabilities on defense. The 49ers, known for their strong defensive front, have given up more passing yards than expected, while the Chiefs’ secondary has been prone to giving up big plays. Despite this, both teams continue to find ways to win, thanks in large part to their high-powered offenses.

Meanwhile, surprise teams like the Detroit Lions and Cleveland Browns have climbed the rankings, thanks to improved defensive play and consistency. Both teams have found success by limiting explosive plays and applying constant pressure on opposing quarterbacks. Their rise highlights how crucial a solid defense is in maintaining success as the season progresses.