1990 MLB season

The 1990 MLB season saw the Cincinnati Reds upset the heavily favored Oakland Athletics in the World Series, for their first title since 1976.

Champions

1990 MLB season by team
American League	AL East	AL West
American League	Baltimore Orioles • Boston Red Sox • Cleveland Indians • Detroit Tigers • Milwaukee Brewers • New York Yankees • Toronto Blue Jays	California Angels • Chicago White Sox • Kansas City Royals • Minnesota Twins • Oakland Athletics • Seattle Mariners • Texas Rangers
National League	NL East	NL West
National League	Chicago Cubs • Montreal Expos • New York Mets • Philadelphia Phillies • Pittsburgh Pirates • St. Louis Cardinals	Atlanta Braves • Cincinnati Reds • Houston Astros • Los Angeles Dodgers • San Diego Padres • San Francisco Giants

Major League Baseball seasons
Pre-modern era	Beginnings	1876 • 1877 • 1878 • 1879 • 1880 • 1881
	Competition	1882 • 1883 • 1884 • 1885 • 1886 • 1887 • 1888 • 1889 • 1890 • 1891
	NL monopoly	1892 • 1893 • 1894 • 1895 • 1896 • 1897 • 1898 • 1899 • 1900
Modern era	Deadball era	1901 • 1902 • 1903 • 1904 • 1905 • 1906 • 1907 • 1908 • 1909 • 1910 • 1911 • 1912 • 1913 • 1914 • 1915 • 1916 • 1917 • 1918 • 1919 • 1920
	Liveball era	1921 • 1922 • 1923 • 1924 • 1925 • 1926 • 1927 • 1928 • 1929 • 1930 • 1931 • 1932 • 1933 • 1934 • 1935 • 1936 • 1937 • 1938 • 1939 • 1940 • 1941
	World War II	1942 • 1943 • 1944 • 1945
	Postwar	1946 • 1947 • 1948 • 1949 • 1950 • 1951 • 1952 • 1953 • 1954 • 1955 • 1956 • 1957 • 1958 • 1959 • 1960
	First expansion	1961 • 1962 • 1963 • 1964 • 1965 • 1966 • 1967 • 1968
	Birth of division play	1969 • 1970 • 1971 • 1972 • 1973 • 1974 • 1975 • 1976 • 1977 • 1978 • 1979 • 1980 • 1981 • 1982 • 1983 • 1984 • 1985 • 1986 • 1987 • 1988 • 1989 • 1990 • 1991 • 1992 • 1993
	Wildcard begins	1994 • 1995 • 1996 • 1997 • 1998 • 1999 • 2000 • 2001 • 2002 • 2003 • 2004 • 2005 • 2006 • 2007 • 2008 • 2009 • 2010 • 2011
	Wildcard expansion	2012 • 2013 • 2014 • 2015 • 2016 • 2017 • 2018 • 2019 • 2020 • 2021 • 2022 • 2023