The list of undefeated teams continues to shrink as the 2026 NFL season moves through Week 4.
Entering Monday Night Football on October 5, there are three NFL teams with perfect 4-0 records: the Kansas City Chiefs, San Francisco 49ers and Minnesota Vikings.
How Many NFL Teams Are 4-0 in 2026?
There are currently three 4-0 teams in the NFL:
- Kansas City Chiefs: 4-0
- San Francisco 49ers: 4-0
- Minnesota Vikings: 4-0
All three teams have survived the opening four weeks without a loss, making them the NFL’s only remaining undefeated teams entering the final game of Week 4.
Kansas City Chiefs Remain Undefeated at 4-0
The Kansas City Chiefs improved to 4-0 following a 30-27 road victory over the Las Vegas Raiders in Week 4.
Kansas City has once again established itself as one of the teams to beat in the AFC. The Chiefs are also the conference’s only undefeated team through four games.
San Francisco 49ers Start the Season 4-0
The San Francisco 49ers are 4-0 after defeating the Denver Broncos 24-14 in Week 4.
San Francisco sits atop the NFC West and remains one of only two undefeated teams in the NFC. The 49ers’ perfect opening month puts them in an early position to contend for one of the conference’s top playoff seeds.
Minnesota Vikings Also Improve to 4-0
The Minnesota Vikings are the other NFC team still carrying a perfect record.
Minnesota moved to 4-0 with a 15-10 victory over the Miami Dolphins in Week 4, keeping pace with San Francisco in the race for the NFC’s best record.
Are There Any Other Undefeated NFL Teams?
No. Through Sunday’s Week 4 games, Kansas City, San Francisco and Minnesota are the NFL’s only undefeated teams at 4-0.
Several teams are close behind at 3-1, but the Chiefs, 49ers and Vikings have separated themselves by getting through their first four games without a loss.
2026 NFL Undefeated Teams After Week 4
| Team | Record | Conference |
|---|---|---|
| Kansas City Chiefs | 4-0 | AFC |
| San Francisco 49ers | 4-0 | NFC |
| Minnesota Vikings | 4-0 | NFC |
Which NFL Teams Are Still Undefeated in 2026?
The answer entering Monday Night Football in Week 4 is simple: three teams remain undefeated — the Chiefs, 49ers and Vikings.
Kansas City is the lone unbeaten AFC team, while San Francisco and Minnesota are battling for early control of the NFC standings.
With the season moving toward Week 5, the question now becomes how long each team can keep its perfect record intact.