Lacrosse
In professional lacrosse, the 1993 Buffalo Bandits are the only team to have won a perfect season in the National Lacrosse League. The Bandits won all ten of their regular season games and won the championship in a two-round tournament; the season was the continuation of a multi-season winning streak that dated to the Bandits’ successful run for the previous year's championship.
Major League Lacrosse, which began play in 2001, has not yet had any perfect season.
Read more about this topic: Perfect Season