This is a list of seasons of Major League Baseball.
1870s Year National League champion Chicago White Stockings Boston Red Caps Providence Grays
1880s Year National League champion American Association champion Union Association champion World's Championship Series champion Chicago White Stockings – – – – – – Cincinnati Red Stockings – – Boston Beaneaters Philadelphia Athletics – – Providence Grays New York Metropolitans St. Louis Maroons Providence Grays (3–0) Chicago White Stockings St. Louis Browns – Tie, Chicago White Stockings and St. Louis Browns (3–3–1) – St. Louis Browns (4–2) Detroit Wolverines – Detroit Wolverines (10–5) New York Giants – New York Giants (6–4) Brooklyn Bridegrooms – New York Giants (6–3)
1890s Year National League champion American Association champion Players' League champion World's Championship Series / Temple Cup champion Brooklyn Bridegrooms Louisville Colonels Boston Reds Tie, Louisville Colonels and Brooklyn Bridegrooms (3–3–1) Boston Beaneaters Boston Reds – – – – Boston Beaneaters (5–0–1) – – – Baltimore Orioles – – New York Giants (4–0) – – Cleveland Spiders (4–1) – – Baltimore Orioles (4–0) Boston Beaneaters – – Baltimore Orioles (4–1) – – – Brooklyn Superbas – – –
1900s Year American League champion National League champion World Series / Chronicle-Telegraph Cup champion – Brooklyn Superbas Brooklyn Superbas (3–1) Chicago White Stockings Pittsburgh Pirates – Philadelphia Athletics – Boston Americans Boston Americans (5–3) New York Giants – Philadelphia Athletics New York Giants (4–1) Chicago White Sox Chicago Cubs Chicago White Sox (4–2) Detroit Tigers Chicago Cubs (4–0) Chicago Cubs (4–1) Pittsburgh Pirates Pittsburgh Pirates (4–3)
1910s Year American League champion National League champion Federal League champion World Series champion Philadelphia Athletics Chicago Cubs – Philadelphia Athletics (4–1) New York Giants – Philadelphia Athletics (4–2) Boston Red Sox – Boston Red Sox (4–3) Philadelphia Athletics – Philadelphia Athletics (4–1) Boston Braves Indianapolis Hoosiers Boston Braves (4–0) Boston Red Sox Philadelphia Phillies Chicago Whales Boston Red Sox (4–1) Brooklyn Robins – Boston Red Sox (4–1) Chicago White Sox New York Giants – Chicago White Sox (4–2) Boston Red Sox Chicago Cubs – Boston Red Sox (4–2) Chicago White Sox Cincinnati Reds – Cincinnati Reds (5–3)
1920s Year American League champion National League champion Negro National League I champion Eastern Colored League champion American Negro League champion World Series champion Colored World Series / NNL I Championship Series Cleveland Indians Brooklyn RobinsChicago American Giants – – Cleveland Indians (5–2) – New York Yankees New York Giants – – New York Giants (5–3) – – – New York Giants (4–0) – Kansas City MonarchsHilldale Club – New York Yankees (4–2) – Washington Senators – Washington Senators (4–3) Kansas City Monarchs (5–4–1) Pittsburgh Pirates – Pittsburgh Pirates (4–3) Hilldale Club (5–1) New York Yankees St. Louis CardinalsChicago American GiantsAtlantic City Bacharach Giants – St. Louis Cardinals (4–3) Chicago American Giants (5–4–2) Pittsburgh Pirates – New York Yankees (4–0) Chicago American Giants (5–3–1) St. Louis Cardinals St. Louis Stars League folded – New York Yankees (4–0) St. Louis Stars (5–4) Philadelphia Athletics Chicago Cubs Kansas City Monarchs – Baltimore Black Sox Philadelphia Athletics (4–1) –
1930s Year American League champion National League champion Negro National League I champion Negro Southern League East–West League Negro National League II champion Negro American League World Series champion NNL I / NSL / NNL II / NAL Championship Series Philadelphia Athletics St. Louis CardinalsSt. Louis Stars – – – – Philadelphia Athletics (4–2)St. Louis Stars (4–3) – – – – St. Louis Cardinals (4–3) – New York Yankees Chicago Cubs – Chicago American GiantsLeague folded – – New York Yankees (4–0) Chicago American Giants (4–3) Washington Senators New York Giants – – – Pittsburgh Crawfords – New York Giants (4–1) – Detroit Tigers St. Louis Cardinals – – – Philadelphia Stars – St. Louis Cardinals (4–3) Philadelphia Stars (4–3–1) Chicago Cubs – – – Pittsburgh Crawfords – Detroit Tigers (4–2) Pittsburgh Crawfords (4–3) New York Yankees New York Giants – – – – New York Yankees (4–2) – – – –Homestead Grays Kansas City Monarchs New York Yankees (4–1) Kansas City Monarchs (5–1–1) Chicago Cubs – – – Memphis Red Sox New York Yankees (4–0) Memphis Red Sox (2–0) Cincinnati Reds – – –Baltimore Elite GiantsKansas City Monarchs New York Yankees (4–0) Baltimore Elite Giants (3–1–1)/Kansas City Monarchs (4–1–1)
1940s Year American League champion National League champion Negro National League II champion Negro American League World Series champion NNL II Championship Series / Negro World Series Detroit Tigers Cincinnati RedsHomestead GraysKansas City Monarchs Cincinnati Reds (4–3) – New York Yankees Brooklyn Dodgers New York Yankees (4–1) Homestead Grays (3–1) St. Louis Cardinals St. Louis Cardinals (4–1) Kansas City Monarchs (4–0) Birmingham Black Barons New York Yankees (4–1) Homestead Grays (4–3–1) St. Louis Browns St. Louis Cardinals (4–2) Homestead Grays (4–1) Detroit Tigers Chicago Cubs Cleveland Buckeyes Detroit Tigers (4–3) Cleveland Buckeyes (4–0) Boston Red Sox St. Louis Cardinals Newark Eagles Kansas City Monarchs St. Louis Cardinals (4–3) Newark Eagles (4–3) New York Yankees Brooklyn Dodgers New York Cubans Cleveland Buckeyes New York Yankees (4–3) New York Cubans (4–1–1) Cleveland Indians Boston Braves Homestead Grays Birmingham Black Barons Cleveland Indians (4–2) Homestead Grays (4–1) New York Yankees Brooklyn Dodgers – – New York Yankees (4–1) –
1950s Year American League champion National League champion World Series champion New York Yankees Philadelphia Phillies New York Yankees (4–0) New York Giants New York Yankees (4–2) Brooklyn Dodgers New York Yankees (4–3) New York Yankees (4–2) Cleveland Indians New York Giants New York Giants (4–0) New York Yankees Brooklyn Dodgers Brooklyn Dodgers (4–3) New York Yankees (4–3) Milwaukee Braves Milwaukee Braves (4–3) New York Yankees (4–3) Chicago White Sox Los Angeles Dodgers Los Angeles Dodgers (4–2)
1960s Year American League champion National League champion World Series champion New York Yankees Pittsburgh Pirates Pittsburgh Pirates (4–3) Cincinnati Reds New York Yankees (4–1) San Francisco Giants New York Yankees (4–3) Los Angeles Dodgers Los Angeles Dodgers (4–0) St. Louis Cardinals St. Louis Cardinals (4–3) Minnesota Twins Los Angeles Dodgers Los Angeles Dodgers (4–3) Baltimore Orioles Baltimore Orioles (4–0) Boston Red Sox St. Louis Cardinals St. Louis Cardinals (4–3) Detroit Tigers Detroit Tigers (4–3) Baltimore Orioles New York Mets New York Mets (4–1)
1970s Year American League champion National League champion World Series champion Baltimore Orioles Cincinnati Reds Baltimore Orioles (4–1) Pittsburgh Pirates Pittsburgh Pirates (4–3) Oakland Athletics Cincinnati Reds Oakland Athletics (4–3) New York Mets Oakland Athletics (4–3) Los Angeles Dodgers Oakland Athletics (4–1) Boston Red Sox Cincinnati Reds Cincinnati Reds (4–3) New York Yankees Cincinnati Reds (4–0) Los Angeles Dodgers New York Yankees (4–2) New York Yankees (4–2) Baltimore Orioles Pittsburgh Pirates Pittsburgh Pirates (4–3)
1980s Year American League champion National League champion World Series champion Kansas City Royals Philadelphia Phillies Philadelphia Phillies (4–2) New York Yankees Los Angeles Dodgers Los Angeles Dodgers (4–2) Milwaukee Brewers St. Louis Cardinals St. Louis Cardinals (4–3) Baltimore Orioles Philadelphia Phillies Baltimore Orioles (4–1) Detroit Tigers San Diego Padres Detroit Tigers (4–1) Kansas City Royals St. Louis Cardinals Kansas City Royals (4–3) Boston Red Sox New York Mets New York Mets (4–3) Minnesota Twins St. Louis Cardinals Minnesota Twins (4–3) Oakland Athletics Los Angeles Dodgers Los Angeles Dodgers (4–1) San Francisco Giants Oakland Athletics (4–0)
1990s Year American League champion National League champion World Series champion Oakland Athletics Cincinnati Reds Cincinnati Reds (4–0) Minnesota Twins Atlanta Braves Minnesota Twins (4–3) Toronto Blue Jays Toronto Blue Jays (4–2) Philadelphia Phillies Toronto Blue Jays (4–2) 1994–95 Major League Baseball strike Cleveland Indians Atlanta Braves Atlanta Braves (4–2) New York Yankees New York Yankees (4–2) Cleveland Indians Florida Marlins Florida Marlins (4–3) New York Yankees San Diego Padres New York Yankees (4–0) Atlanta Braves New York Yankees (4–0)
2000s Year American League champion National League champion World Series champion New York Yankees New York Mets New York Yankees (4–1) Arizona Diamondbacks Arizona Diamondbacks (4–3) Anaheim Angels San Francisco Giants Anaheim Angels (4–3) New York Yankees Florida Marlins Florida Marlins (4–2) Boston Red Sox St. Louis Cardinals Boston Red Sox (4–0) Chicago White Sox Houston Astros Chicago White Sox (4–0) Detroit Tigers St. Louis Cardinals St. Louis Cardinals (4–1) Boston Red Sox Colorado Rockies Boston Red Sox (4–0) Tampa Bay Rays Philadelphia Phillies Philadelphia Phillies (4–1) New York Yankees New York Yankees (4–2)
2010s Year American League champion National League champion World Series champion Texas Rangers San Francisco Giants San Francisco Giants (4–1) St. Louis Cardinals St. Louis Cardinals (4–3) Detroit Tigers San Francisco Giants San Francisco Giants (4–0) Boston Red Sox St. Louis Cardinals Boston Red Sox (4–2) Kansas City Royals San Francisco Giants San Francisco Giants (4–3) New York Mets Kansas City Royals (4–1) Cleveland Indians Chicago Cubs Chicago Cubs (4–3) Houston Astros Los Angeles Dodgers Houston Astros (4–3) Boston Red Sox Boston Red Sox (4–1) Houston Astros Washington Nationals Washington Nationals (4–3)
2020s Year American League champion National League champion World Series champion Tampa Bay Rays Los Angeles Dodgers Los Angeles Dodgers (4–2) Houston Astros Atlanta Braves Atlanta Braves (4–2) Philadelphia Phillies Houston Astros (4–2) Texas Rangers Arizona Diamondbacks Texas Rangers (4–1) New York Yankees Los Angeles Dodgers Los Angeles Dodgers (4–1) Toronto Blue JaysLos Angeles Dodgers (4–3)
References
External links List showing league champions at Baseball-Reference.com List showing all playoff series results at Baseball-Reference.com