<P> Further expansion of the postseason began in 1995, with eight teams entering the playoffs each year (further expanded to ten teams in 2012). In this era, the Braves entered the postseason 14 consecutive years from 1991 to 2005 (again not counting 1994), while the Yankees had a streak of 13 appearances from 1995 to 2007 . However, all other postseason appearance streaks of 5 years or more predate the expanded - postseason era and are mentioned above, except for 5 - year runs by the Cleveland Indians (1995--1999), the Philadelphia Phillies (2007--2011), the St. Louis Cardinals (2011--2015), and the Los Angeles Dodgers (2013--2017). </P> <P> The Yankees have achieved one streak each of 3, 4, and 5 championships in a row, and the Athletics have achieved a streak of 3 in a row . Back - to - back championships have been achieved an additional ten times . </P> <Table> <Tr> <Th> Length </Th> <Th> Team </Th> <Th> Seasons </Th> </Tr> <Tr> <Td> 5 </Td> <Td> New York Yankees </Td> <Td> 1949--1953 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> 1936--1939 </Td> </Tr> <Tr> <Td> </Td> <Td> Oakland Athletics </Td> <Td> 1972--1974 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> 1998--2000 </Td> </Tr> <Tr> <Td> </Td> <Td> Chicago Cubs </Td> <Td> 1907--1908 </Td> </Tr> <Tr> <Td> </Td> <Td> Philadelphia Athletics </Td> <Td> 1910--1911 </Td> </Tr> <Tr> <Td> </Td> <Td> Boston Red Sox </Td> <Td> 1915--1916 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Giants </Td> <Td> 1921--1922 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> 1927--1928 </Td> </Tr> <Tr> <Td> </Td> <Td> Philadelphia Athletics </Td> <Td> 1929--1930 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> 1961--1962 </Td> </Tr> <Tr> <Td> </Td> <Td> Cincinnati Reds </Td> <Td> 1975--1976 </Td> </Tr> <Tr> <Td> </Td> <Td> New York Yankees </Td> <Td> 1977--1978 </Td> </Tr> <Tr> <Td> </Td> <Td> Toronto Blue Jays </Td> <Td> 1992--1993 </Td> </Tr> </Table> <Tr> <Th> Length </Th> <Th> Team </Th> <Th> Seasons </Th> </Tr>

Who won the world series twice in a row
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