That would be the New York Yankees with 5 straight between 1949-1953 and 1960-1964. The Yankees have also won four straight pennants 3 times (1936-1939, 1955-1958, 1998-2001). The only other MLB team to have won four consecutive pennants is the New York Giants (1921-1924).
The most consecutive World Series appearances without a win is 3 by the 1907-1909 Detroit Tigers and 1911-1913 New York Giants.
New York Giants from 1921-1924.
The Oakland A's have won 15 American League Pennants in their history.
Since 1950, the Yankees have won 24 American League pennants.
John McGraw with 11, all with the New York Giants between 1902-1932.Casey Stengel is second with 10 pennants, won with the New York Yankees between 1949-1960.
40 PennantsThe New York Yankees have won 40 American League Pennants. and won 27 World Series Championships. They have more championships than any other North American franchise in professional sports history. The New York Yankees were named the century's greatest team in 1999, with 25 World Series Championships at the time. That is 1 world series championship every 4 years.
New York Yankees
The New York Yankees won 40 American League pennants. That is the most in major league baseball.
oakland
New York Giants from 1921-1924.
The Los Angeles Dodgers have 18 National League Pennants second to the New York Yankees with 40 Amearican League Pennants. The Oakland Athletics have the second most in the American League with 14 pennants.
New York Yankees - 1998-2001 Also the Chicago Cubs 1906 - 1910
The Yankees have won 40 American League pennants.
The Oakland A's have won 15 American League Pennants in their history.
Braves.
Cuba
Since 1950, the Yankees have won 24 American League pennants.
new york yankees