That would be the 1899 Cleveland Spiders (National League) whose record was 20-134.
No. Their worst season record was 1-15 in 2007.
2001 seattle marlins
The Cubs worst winning percentage in a season is .364 by the 1962 and 1966 teams. Both teams had a record of 59-103.
116 wins Seattle Mariners
The Chicago Bulls had a record of 72-10 in the 1995-1996 season.
20-134 by the 1899 Cleveland Spiders. The team was contracted by the National League after the 1899 season along with the Washington Senators, Baltimore Orioles, and Louisville Colonels.
they went 12-4 in the regular season in 1988 and then 2-1 in the playoffs that year
The 1995-96 Chicago Bulls with a 72 - 10 record.
Through the 2008 season, that was both the 1992 and 2007 regular season when the Cowboys went 13-3.
114-48 in the 1998 season. They went on to win the World Series that season.
The Vikings worst winning percentage for a season came in 1962 when their record was 2-11-1 for a winning percentage of .179. The most losses in a season was 13 in 1984 when they went 3-13 for a winning percentage of .188.