NFL Power Rankings entering Week 5: Chiefs are all the way back at 4-0, though injury concerns linger

Key Points:

• The Kansas City Chiefs continue their dominance with a 4-0 start despite doubts after a 6-11 season last year and injuries to key receivers; Patrick Mahomes looks healthy and free-agent Kenneth Walker has added a new dimension to the offense.
• Several teams remain winless or struggling, including the Miami Dolphins (0-4) facing quarterback uncertainty, the Tennessee Titans (0-4) showing minor progress, and the Tampa Bay Buccaneers (0-4) dealing with quarterback injuries and coaching pressure.
• The Chicago Bears have surged to 3-1 thanks to a strong defense, while the Jacksonville Jaguars (3-1) and San Francisco 49ers (4-0) are also top contenders, with the 49ers leading the league in offensive efficiency.
• Injuries and inconsistent play have hampered teams like the New York Jets (1-3), Philadelphia Eagles (2-2), and Denver Broncos (2-2), with concerns mounting over quarterback performances and offensive production.
• Upcoming matchups, such as the 49ers at Seahawks and the Chiefs' favorable schedule, will be critical in shaping the NFL power rankings and playoff outlooks as the season progresses.