MLB - All time streaks above .500

       Franchise
  1 New York Yankees        39 years - 1926..1964
  2 Baltimore Orioles       18 years - 1968..1985
  3 Chicago White Sox       17 years - 1951..1967
  4 Boston Red Sox          16 years - 1967..1982
  5 Atlanta Braves          15 years - 1991..2005
  5 New York Yankees        15 years - 1993..2007
  5 St. Louis Cardinals     15 years - 1939..1953
  8 Atlanta Braves          14 years - 1953..1966
  8 Chicago Cubs            14 years - 1926..1939
  8 San Francisco Giants    14 years - 1958..1971
 11 Los Angeles Dodgers     13 years - 1945..1957
 11 Pittsburgh Pirates      13 years - 1918..1930
 13 Chicago Cubs            12 years - 1903..1914
 13 San Francisco Giants    12 years - 1903..1914
 15 Detroit Tigers          11 years - 1978..1988
 15 Pittsburgh Pirates      11 years - 1903..1913
 15 Toronto Blue Jays       11 years - 1983..1993
 18 Boston Red Sox          10 years - 1909..1918
 18 Boston Red Sox          10 years - 1998..2007
 18 Cincinnati Reds         10 years - 1972..1981
 18 Cleveland Indians       10 years - 1947..1956
 18 Los Angeles Dodgers     10 years - 1969..1978
 18 Philadelphia Phillies   10 years - 1975..1984
 18 San Francisco Giants    10 years - 1916..1925
 25 Oakland Athletics        9 years - 1925..1933
 25 Oakland Athletics        9 years - 1968..1976