The MLB team with the longest undefeated record in history is the 1916 New York Giants, who went 26 games without a loss.
Connecticut.
The Philidelphia Flyers went undefeated for a 35 game stretch in the 1979-80 season.
For a single season the Miami Dolphins.
1976 Indiana Hoosiers
Miami dolphins
Miami Dolphins, Undefeated Season
The Utes have had 2 undefeated seasons in their history. One in 2004, and one in 2008.
The University of Tennessee Lady Volunteers basketball team was undefeated in the 1997-1998 season. The team won the NCAA Championship and had a record for the season of 39-0.
The Chicago Bears
The longest team shutout streak in NHL history is held by the 1975-76 Philadelphia Flyers, who recorded five consecutive shutouts. This remarkable achievement showcased the team's dominant defensive performance and skilled goaltending during that season. Their streak remains a significant record in the league's history.
The longest a team has gone scoreless in the history of Major League Baseball is 23 consecutive innings. This record was set by the Philadelphia Phillies in 1960. In more recent history, the record for the longest scoreless streak in the NFL is held by the 1977 New Orleans Saints, who went 13 consecutive quarters without scoring a touchdown. These streaks highlight the challenges teams can face in maintaining offensive momentum.
If team A invariably loses to team B, their chances of remaining undefeated in a given season are effectively zero, assuming they play against team B at least once. Each loss to team B would contribute to their overall record, preventing them from achieving an undefeated status. Therefore, regardless of their performance against other teams, the certainty of a loss against team B guarantees that they cannot remain undefeated.