Five weeks into the 2025 NFL season, there are no more teams undefeated. The Buffalo Bills were the last team standing, but its unbeaten streak came to an end when it lost to the New England Patriots on “Sunday Night Football.”
The Philadelphia Eagles were the other team that arrived in Week 5 riding on a perfect 4-0 run, but the defending Super Bowl champions were handed their first loss of the year in their visit to the Denver Broncos.
Needless to say, the Bills were facing added pressure in their pursuit of an extremely elusive Super Bowl win. Not only is Josh Allen facing the task of leading the franchise to the promised land for the first time ever, but to do so while avoiding defeat looked like a miraculous task. There’s a reason only one team in NFL history pulled off this feat.
How many NFL teams have finished a season undefeated?
The Miami Dolphins are the only team in NFL history to finish a season without losing a single game. In 1972, the team coached by Don Shula went all the way to Super Bowl VII victory with a 17-0 record, in a campaign that went down as the perfect season.