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Chiefs, 49ers and Vikings stay unbeaten as NFL Week 4 delivers 14-game slate
Kansas City, San Francisco and Minnesota all moved to 4-0 on a busy Sunday, while Chicago won with its third starting quarterback of the season.
By Eleanor Ellington · 5 min read
Three teams remain unbeaten after a packed Sunday of NFL action, with the Kansas City Chiefs, San Francisco 49ers and Minnesota Vikings all improving to 4-0 during Week 4. The results leave the trio as the early pace-setters in a season that has already tested squad depth across the league.
The Chiefs, 49ers and Vikings each extended their perfect starts on a day that featured a full 14-game slate, giving supporters across the United Kingdom and beyond a crowded schedule of scores, highlights and injury updates to follow. The three wins underline the value of consistency in the opening month, when form, fitness and roster rotation begin to shape the wider standings.
Chicago also claimed a notable result, winning with its third starting quarterback of the season. The Bears' ability to adapt at the sport's most demanding position has kept them competitive despite disruption behind centre, and the victory offers a measure of stability as the club navigates the early weeks of the campaign.
Week 4 is often viewed as the point at which early-season patterns start to harden. By the end of the month, coaching staffs have enough film to identify recurring weaknesses, while front offices weigh whether to reinforce thin positions or trust the players already in the building. For the unbeaten sides, the challenge now is to sustain momentum as opponents adjust.
For the teams still searching for rhythm, the Sunday slate brought a mix of encouragement and frustration. Injuries remain a central concern, with clubs monitoring the fitness of key contributors as the season moves towards its second quarter. Depth has already proved decisive for several franchises, particularly those forced to turn to backup options at quarterback.
The Bears' quarterback situation illustrates how quickly plans can change. Using a third different starter under centre within the first month places added responsibility on the coaching staff, the offensive line and the wider squad. That Chicago still managed to win suggests the roster has absorbed the disruption better than many expected.
At the top of the table, the Chiefs, 49ers and Vikings have combined steady quarterback play with disciplined defence and efficient game management. Their 4-0 records do not guarantee anything at this stage, but they provide a platform that rival teams will study closely over the coming weeks.
Sunday's results also carried implications for the wider playoff picture. In a league where divisional races are often decided by fine margins, banking early victories can prove valuable later in the season, when travel, weather and fatigue take their toll. The unbeaten teams have given themselves room to absorb a setback or two.
Supporters following the action from Britain had a full day of fixtures to track, with scores updating across the afternoon and evening. The popularity of the NFL in the UK continues to grow, and weekends like this one offer newcomers and long-time followers alike a clear view of the league's competitive balance.
Attention now turns to how the unbeaten sides handle the pressure of protecting their records. History suggests that maintaining a perfect start becomes harder as the season progresses, particularly once injuries accumulate and opponents gain a clearer picture of each team's tendencies.
For the Chiefs, 49ers and Vikings, the immediate priority is recovery and preparation. For Chicago, the focus is on building on a win achieved under difficult circumstances. And for the rest of the league, Week 4 served as a reminder that early-season form can shift quickly.
The next round of fixtures will test whether the leading trio can keep their run going and whether the chasing pack can close the gap. With the season still in its opening phase, the standings remain fluid, but the first month has already produced a clear group at the front.
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