Conversation so far:
who has won the last 10 world series?
The 2008-2018 Champions include the Philadelphia Phillies, New York Yankees, San Francisco Giants, Louis Cardinals, Boston Red Sox, Kansas City Royals, Chicago Cubs, and Houston Astros.
what team has won the most World Series since 2000?
Boston Red Sox, winning in 2004, 2007, 2013, and 2018
who has won the most World Series all time?
The New York Yankees of the AL have played in 40 World Series through 2018—winning 27—the most Series appearances and most victories of any Major League Baseball franchise.

Question: who has the most losses?
Self-contained rewrite: who has the most World Series losses?