The 2011 Dodgers
the kansas city royals
There is no worst baseball team in MLB.
the worst team is the Astros they are falling apart
the Houston Astros
It isn't measurable.
They are the worst team in the mlb
The 1988 Baltimore Orioles lost their first 21 games of the season.
The Washington Nationals
Through the 2008 season, the Tampa Bay Rays have the worst lifetime winning percentage of any MLB team with .417 (742-1037).
In the entire history of MLB, that is the Giants.