33 MLB Seasons In Which Top 2 Teams Combined for 64%+ Winning Percentage

Since the creation of Major League Baseball Divisions in 1969, the top two teams combined to win more than 64 percent of their games only five times. The Houston Astros and Los Angeles Dodgers current pace puts them in that group:

Year	Team - World Series Res	Won	Lost	top 2 W%
1998	New York Yankees  W	114	48	67.90%
1998	Atlanta Braves	106	56	67.90%
2001	Seattle Mariners	116	46	67.28%
2001	Oakland Athletics	102	60	67.28%
1995	Cleveland Indians  L	100	44	65.97%
1995	Atlanta Braves  W	90	54	65.97%
1970	Baltimore Orioles  W	108	54	64.81%
1970	Cincinnati Reds  L	102	60	64.81%
1969	Baltimore Orioles  L	109	53	64.51%
1969	New York Mets  W	100	62	64.51%
2017	Los Angeles Dodgers ?	63	29	64.24%
2017	Houston Astros ?	61	30	64.24%

It was easier to hit that mark prior to expansion, as 28 of 68 seasons featured two teams that combined for a winning percentage of above 64 percent from 1901 to 1968.

Here are the best duos. A "W" indicates the team won the World Series and "L" indicates they lost the World Series, and this was during an era in which the top AL and NL team went straight to the World Series. The only time the top two teams topped a 70 percent winning percentage was in 1909 when the Pirates beat out the Cubs for the NL title and went onto take the World Series.

Year	Team - World Series Res	Won	Lost	top 2 W%
1909	Pittsburgh Pirates  W	110	42	70.16%
1909	Chicago Cubs	104	49	70.16%
1906	Chicago Cubs  L	116	36	69.74%
1906	New York Giants	96	56	69.74%
1954	Cleveland Indians  L	111	43	69.48%
1954	New York Yankees	103	51	69.48%
1912	Boston Red Sox  W	105	47	68.65%
1912	New York Giants  L	103	48	68.65%
1942	St. Louis Cardinals  W	106	48	68.18%
1942	Brooklyn Dodgers	104	50	68.18%
1931	Philadelphia Athletics  L	107	45	67.97%
1931	St. Louis Cardinals  W	101	53	67.97%
1910	Chicago Cubs  L	104	50	67.76%
1910	Philadelphia Athletics  W	102	48	67.76%
1902	Pittsburgh Pirates	103	36	67.64%
1902	Philadelphia Athletics	83	53	67.64%
1929	Philadelphia Athletics  W	104	46	66.89%
1929	Chicago Cubs  L	98	54	66.89%
1953	Brooklyn Dodgers  L	105	49	66.89%
1953	New York Yankees  W	99	52	66.89%
1939	New York Yankees  W	106	45	66.56%
1939	Cincinnati Reds  L	97	57	66.56%
1927	New York Yankees  W	110	44	66.23%
1927	Pittsburgh Pirates  L	94	60	66.23%
1943	St. Louis Cardinals  L	105	49	65.91%
1943	New York Yankees  W	98	56	65.91%
1915	Boston Red Sox  W	101	50	65.90%
1915	Detroit Tigers	100	54	65.90%
1907	Chicago Cubs  W	107	45	65.89%
1907	Detroit Tigers  L	92	58	65.89%
1911	Philadelphia Athletics  W	101	50	65.79%
1911	New York Giants  L	99	54	65.79%
1919	Cincinnati Reds  W	96	44	65.71%
1919	Chicago White Sox  L	88	52	65.71%
1905	New York Giants  W	105	48	65.69%
1905	Pittsburgh Pirates	96	57	65.69%
1904	New York Giants	106	47	65.47%
1904	Boston Americans	95	59	65.47%
1903	Pittsburgh Pirates  L	91	49	65.47%
1903	Boston Americans  W	91	47	65.47%
1932	New York Yankees  W	107	47	65.26%
1932	Philadelphia Athletics	94	60	65.26%
1941	New York Yankees  W	101	53	65.26%
1941	Brooklyn Dodgers  L	100	54	65.26%
1946	Boston Red Sox  L	104	50	65.16%
1946	St. Louis Cardinals  W	98	58	65.16%
1928	New York Yankees  W	101	53	64.82%
1928	Philadelphia Athletics	98	55	64.82%
1961	New York Yankees  W	109	53	64.81%
1961	Detroit Tigers	101	61	64.81%
1913	New York Giants  L	101	51	64.59%
1913	Philadelphia Athletics  W	96	57	64.59%
1937	New York Yankees  W	102	52	64.38%
1937	New York Giants  L	95	57	64.38%
1917	Chicago White Sox  W	100	54	64.29%
1917	New York Giants  L	98	56	64.29%