Undefeated NFL teams 2025: Are there any left heading into Week 6?

It took only five weeks of football for the NFL's parity to win out. The Eagles and Bills were the last two teams to remain undefeated through Week 4, but both teams met their match, leaving no undefeated teams left in the 2025 NFL season. Let's check out how each team lost:

Drake Maye looked strong, Stefon Diggs cooked his old team and rookie kicker Andres Borregales delivered in crunch time to help New England shock Buffalo on Sunday Night Football.

The Bills were the last of the unbeatens heading into the contest, and will now wonder what could've been thanks to the upstart Pats. Borregales, after converting makes of 30 and 19, drilled a 52-yard attempt with 15 seconds left in the game to steal an important win over a dominant AFC East foe.

Meanwhile, Maye showed exactly why he's New England's QB of the future in his first primetime start, finishing 22-of-30 for 273 yards with no turnovers. Diggs ended the game with 10 receptions (12 targets) for a season-best 146 yards while Rhamondre Stevenson added two pivotal rushing TDs despite pedestrian numbers (14 rushing, 13 receiving).

For Josh Allen and the Bills, a disjointed performance caused by a feisty Pats defense resulted in a season-low 20 points. Allen went 22-of-31 for 253 yards, two TDs and an INT while leading the team with 53 rushing yards on nine carries.

Bills RB James Cook was held to 49 yards on 15 carries and failed to score a TD for the first time this season.

In all, the teams combined for 701 yards of offense, the majority of which came in the second half after a defensive battle in the first.

Bo Nix threw an 11-yard touchdown pass and J.K. Dobbins rushed for a 2-yard score in the fourth quarter as the Denver Broncos wiped out a 14-point deficit to hand