In an exciting NFL Week 4, the Kansas City Chiefs, San Francisco 49ers, and Minnesota Vikings all remained undefeated, each improving their records to 4-0. The Bears managed a win with their third starting quarterback of the season, illustrating the volatility of team compositions. Key takeaways from the week include the dominance of offenses from the Cowboys and Jaguars, while analysis revealed nearly every projected contender has shown potential weaknesses. The Chiefs delivered a thrilling victory over the Raiders, handing them their first loss, while several teams continue to struggle without a win. Highlights included standout performances and pivotal moments that showcased the evolving landscape of this NFL season.