As of the 2008 season:
1) New York Yankees - 26 World Series won
2) St. Louis Cardinals - 10 World Series won
3) Oakland Athletics - 9 World Series won (5 of those were in Philadelphia)
4) Boston Red Sox - 7 World Series won
The Boston Red Sox won the fourth most World Series titles with 7, behind the Yankees with 27, the Cardinals with 10, and the Athletics with 9.
The New York Yankees have played in the most World Series games.
Yankees...26
The Oakland Athletic have the third most World Series titles with 9.
The New York Yankees appeared in the most World Series and Won 27 titles.
The New York Yankees have won the most World Series titles (26)
Most World Series won: New York Yankees - 27.
New York YankeesThe New York Yankees have 27 World Series titles. The St. Louis Cardinals are second with 10 World Series titles. The Oalkland Athletics are third with 9, and the Boston Red Sox are fourth with 7.
The Los Angeles Dodgers have the 5th most World Series titles with 6.
The St. Louis Cardinals have the second most World Series titles with 10.
The New York Yankees appeared in 40 World Series, and won 27.
The Oakland Athletic won the third most World Series titles with 9.