the New York Yankees with 26 world championships
The Celtics are the best, no doubt about it! The Celtics have won 16 (or so) championships, which is the best in NBA. However, the New York Yankees have won 29 (or so) World Series titles. No, the Yankees have 27 titles. If this question is asking about any team, there are 2 major soccer/football/futbal teams that have more titles than that. Real Madrid C.F. from Spain has won the league 31 times. S.L. Benfica from Portugal has also won the league 31 times. These teams have also won other titles (additional cups and tournaments that they play in, in addition to their respective leagues they play in....i.e. La Liga, and Liga Sagres) Club Atletico River Plate from Argentina has won the league 33 times. macabi tel aviv israeli basketball team has 101 trophis in total (50 in the israeli leage).
The top two teams with the most World Series titles are the New York Yankees with 27, and the St. Louis Cardinals with 10.
Top 5 Teams World Series AppearancesThe New York Yankees appeared in 40 World Series, The Dodgers 18, the Cardinals and the Giants 17, and the Athletics 14.
The New York Yankees have won 27 titles, accounting for 25% of all series played and 43% of the wins by American League teams. The St. Louis Cardinals have won 11 World Series (10%) and 24% of the 46 National League victories.