Of the four major team sports, Major League Baseball's New York Yankees has the most professional championships in history. As of 2014, the long-time American League power has won 27 World Series titles.
The Yankees' resume includes five consecutive championships from 1949-1953, four consecutive titles from 1936-1939 and three straight titles from 1998-2000, with the most recent triumph coming in 2009. Second on the list is the NHL's Montreal Canadiens with 24 Stanley Cup crowns, including five in a row from 1956-1960 and 10 of 15 from 1965-1979. The Boston Celtics occupy the third spot with 17 NBA championships in its storied history, including eight consecutive titles from 1959-1966.