the worst team is the Astros they are falling apart
In MLB, 1.22 by the 1876 St. Louis Brown Stockings of the National League.
the Houston Astros
They are the worst team in the mlb
Through the 2008 season, the Tampa Bay Rays have the worst lifetime winning percentage of any MLB team with .417 (742-1037).
The Washington Nationals
The team with the worst winning percentage in the history of MLB -- the 1899 Cleveland Spiders -- still managed to win 20 games out of the 154 they played that year. This dismal .130 winning percentage is so bad that it is extremely unlikely that any MLB team will do worse. The 1916 Philadelphia Athletics -- the third worst team in MLB history -- had a .235 winning percentage, 100 points better than the Spiders.
The 1962 New York Mets set the all time record for futility with 120 losses.
The Pittsburgh pirates
The Cincinnati Red Stockings were the first team in MLB history
Like other pro sports, the team finished last and with the worst record, or you trade for it.