What does a perfect season in football mean?
Perfect season
In the NBA, the 1985–86 Boston Celtics played a nearly perfect home season. During the regular season, they were 40–1 (.976) in front of their home crowd. The Celtics' only regular-season home loss occurred on December 6, 1985, to the Portland Trail Blazers, by the score of 121–103. The Celtics would also win all 10 of their home games in the postseason, to finish 50–1 at home. The 2015–16 San Antonio Spurs also played a nearly perfect home regular-season with a 40-1 (.976) record in front of their home crowd, with their only home loss occurring on April 10, 2016 vs. the Golden State Warriors by the score of 92-86. The Spurs were eliminated in the Western Conference Semi-Finals by the Oklahoma City Thunder in the 2016 NBA Playoffs.  The Spurs played a total of 5 home games in the post season, finishing 43-3 at home, losing twice to the Thunder. The three-on-three basketball league BIG3, which featured an eight-game regular season and two-round playoff, had a perfect team in its inaugural season when Trilogy swept all ten games on their schedule.