Through the 2009 season, that is 104 by the 1905 team that was known as the Brooklyn Superbas. The most losses in a season the team has had since playing in Los Angeles is 99 by the 1992 team.
The most losses by a team in NBA history was by the 1972-73 Philadelphia 76ers who had a regular season record of 9-73.
Through the 2013 season, the Arizona Cardinalshave the most losses in NFL history, with 723. Regular season (716), playoffs (7).
lions
Huston astros
Chicago Cubs
The NHL team with the most losses in one season is the 1992-1993 San Jose Sharks, with a record of 11-71-2.
Through the 2008 season, the fewest losses by an MLB team in a regular season is 36 by the 1906 Chicago Cubs. The 1906 Cubs are tied, with the 2001 Seattle Mariners, for most wins by a team in an MLB regular season with 116.
The MLB record for fewest wins by a team in a season was set by the 1899 Cleveland Spiders. They won 20 games that season and lost 134. The 134 losses is also an MLB record for most losses by a team in a season.
Philadelphia, 9-73
Cleveland spiders
The MLB team that holds the record for the most losses are the New York Mets. During the 1962 season, they had 40 wins and 120 losses. After them are the Detroit Tigers who won 43 and lost 119 during the 2003 season.