Historically, the last undefeated MLB team has made the postseason 34.8% (56/161) of the time. The most recent time the last undefeated team missed the postseason was the 2019 Philadelphia Phillies, who started the season 4-0 but finished the season 81-81 and didn't end up making the postseason.
The most recent time the last undefeated team won the World Series was the 2015 Kansas City Royals, who started the season 7-0, finished the season 95-67, and then went on to win the World Series.
The last undefeated MLB team, in a typical season, can be expected to start the season about 4-0.
| Year | Team | First Loss | Record | Season Result | |
|---|---|---|---|---|---|
| Before Loss | Final | ||||
| 2024 | Detroit Tigers | Apr 4, 2024 | 5-0 | – | Season Ongoing |
| 2023 | Tampa Bay Rays | Apr 14, 2023 | 13-0 | 99-63 | Lost ALWC |
| 2022 | Tampa Bay Rays | Apr 11, 2022 | 3-0 | 86-76 | Lost ALWC |
| 2021 | Washington Nationals | Apr 7, 2021 | 1-0* | 65-97 | Missed Playoffs |
| 2020 | Houston Astros | Jul 26, 2020 | 2-0 | 29-31 | Lost ALCS |
| San Diego Padres | Jul 26, 2020 | 2-0 | 37-23 | Lost NLDS | |
| St. Louis Cardinals | Jul 26, 2020 | 2-0 | 30-28 | Lost NLWC | |
| 2019 | Philadelphia Phillies | Apr 3, 2019 | 4-0 | 81-81 | Missed Playoffs |
| 2018 | Pittsburgh Pirates | Apr 4, 2018 | 4-0 | 82-79 | Missed Playoffs |
| 2017 | Baltimore Orioles | Apr 9, 2017 | 4-0 | 75-87 | Missed Playoffs |
| 2016 | Baltimore Orioles | Apr 13, 2016 | 7-0 | 89-73 | Lost ALWC |
| 2015 | Kansas City Royals | Apr 15, 2015 | 7-0 | 95-67 | Won WS |
| 2014 | Detroit Tigers | Apr 6, 2014 | 4-0 | 90-72 | Lost ALDS |
| 2013 | Washington Nationals | Apr 5, 2013 | 3-0 | 86-76 | Missed Playoffs |
| 2012 | Arizona Diamondbacks | Apr 11, 2012 | 4-0 | 81-81 | Missed Playoffs |
| Detroit Tigers | Apr 11, 2012 | 4-0 | 88-74 | Lost WS | |
| 2011 | Texas Rangers | Apr 9, 2011 | 6-0 | 96-66 | Lost WS |
| 2010 | San Francisco Giants | Apr 10, 2010 | 4-0 | 92-70 | Won WS |
| 2009 | Florida Marlins | Apr 11, 2009 | 4-0 | 87-75 | Missed Playoffs |
| 2008 | Kansas City Royals | Apr 4, 2008 | 3-0 | 75-87 | Missed Playoffs |
| 2007 | New York Mets | Apr 7, 2007 | 4-0 | 88-74 | Missed Playoffs |
| Minnesota Twins | Apr 7, 2007 | 3-0 | 79-83 | Missed Playoffs | |
| 2006 | Detroit Tigers | Apr 9, 2006 | 5-0 | 95-67 | Lost WS |
| Milwaukee Brewers | Apr 9, 2006 | 5-0 | 75-87 | Missed Playoffs | |
| 2005 | Milwaukee Brewers | Apr 9, 2005 | 3-0 | 81-81 | Missed Playoffs |
| 2004 | Detroit Tigers | Apr 10, 2004 | 4-0 | 72-90 | Missed Playoffs |
| 2003 | Kansas City Royals | Apr 13, 2003 | 9-0 | 83-79 | Missed Playoffs |
| 2002 | San Francisco Giants | Apr 9, 2002 | 6-0 | 95-66 | Lost WS |
| 2001 | Houston Astros | Apr 7, 2001 | 4-0 | 93-69 | Lost NLDS |
| Minnesota Twins | Apr 7, 2001 | 3-0 | 85-77 | Missed Playoffs | |
| 2000 | Arizona Diamondbacks | Apr 7, 2000 | 3-0 | 85-77 | Missed Playoffs |
| St. Louis Cardinals | Apr 7, 2000 | 3-0 | 95-67 | Lost NLCS | |
| 1999 | Boston Red Sox | Apr 11, 1999 | 5-0 | 94-68 | Lost ALCS |
| 1998 | Cleveland Indians | Apr 8, 1998 | 6-0 | 89-73 | Lost ALCS |
| 1997 | Baltimore Orioles | Apr 6, 1997 | 4-0 | 98-64 | Lost ALCS |
| 1996 | Texas Rangers | Apr 11, 1996 | 7-0 | 90-72 | Lost ALDS |
| 1995 | 5+ Teams | – | – | – | – |
| 1994 | Atlanta Braves | Apr 12, 1994 | 7-0 | 68-46 | No Postseason |
| 1993 | Pittsburgh Pirates | Apr 10, 1993 | 3-0 | 75-87 | Missed Playoffs |
| Texas Rangers | Apr 10, 1993 | 3-0 | 86-76 | Missed Playoffs | |
| 1992 | New York Yankees | Apr 14, 1992 | 6-0 | 76-86 | Missed Playoffs |
| 1991 | Chicago White Sox | Apr 17, 1991 | 6-0 | 87-75 | Missed Playoffs |
| 1990 | Cincinnati Reds | Apr 22, 1990 | 9-0 | 91-71 | Won WS |
| 1989 | Oakland Athletics | Apr 7, 1989 | 3-0 | 99-63 | Won WS |
| Baltimore Orioles | Apr 7, 1989 | 2-0 | 87-75 | Missed Playoffs | |
| Texas Rangers | Apr 7, 1989 | 2-0 | 83-79 | Missed Playoffs | |
| 1988 | New York Yankees | Apr 11, 1988 | 5-0 | 85-76 | Missed Playoffs |
| 1987 | Milwaukee Brewers | Apr 21, 1987 | 13-0 | 91-71 | Missed Playoffs |
| 1986 | St. Louis Cardinals | Apr 13, 1986 | 4-0 | 79-82 | Missed Playoffs |
| 1985 | Detroit Tigers | Apr 17, 1985 | 6-0 | 84-77 | Missed Playoffs |
| 1984 | Detroit Tigers | Apr 19, 1984 | 9-0 | 104-58 | Won WS |
| 1983 | Pittsburgh Pirates | Apr 12, 1983 | 5-0 | 84-78 | Missed Playoffs |
| 1982 | Atlanta Braves | Apr 22, 1982 | 13-0 | 89-73 | Lost NLCS |
| 1981 | Oakland Athletics | Apr 19, 1981 | 11-0 | 64-45 | Lost ALCS |
| 1980 | Cincinnati Reds | Apr 18, 1980 | 8-0 | 89-73 | Missed Playoffs |
| 1979 | Texas Rangers | Apr 15, 1979 | 6-0 | 83-79 | Missed Playoffs |
| 1978 | Milwaukee Brewers | Apr 14, 1978 | 5-0 | 93-69 | Missed Playoffs |
| 1977 | Kansas City Royals | Apr 13, 1977 | 4-0 | 102-60 | Lost ALCS |
| Texas Rangers | Apr 13, 1977 | 4-0 | 94-68 | Missed Playoffs | |
| 1976 | Pittsburgh Pirates | Apr 17, 1976 | 5-0 | 92-70 | Missed Playoffs |
| 1975 | Pittsburgh Pirates | Apr 14, 1975 | 3-0 | 92-69 | Lost NLCS |
| 1974 | Montreal Expos | Apr 13, 1974 | 2-0* | 79-82 | Missed Playoffs |
| 1973 | Boston Red Sox | Apr 15, 1973 | 4-0 | 89-73 | Missed Playoffs |
| 1972 | Montreal Expos | Apr 23, 1972 | 5-0 | 70-86 | Missed Playoffs |
| 1971 | Baltimore Orioles | Apr 11, 1971 | 3-0 | 101-57 | Lost WS |
| 1970 | Minnesota Twins | Apr 16, 1970 | 4-0* | 98-64 | Lost ALCS |
| 1969 | Atlanta Braves | Apr 12, 1969 | 4-0 | 93-69 | Lost NLCS |
| Chicago Cubs | Apr 12, 1969 | 4-0 | 92-70 | Missed Playoffs | |
| Pittsburgh Pirates | Apr 12, 1969 | 4-0 | 88-74 | Missed Playoffs | |
| 1968 | Minnesota Twins | Apr 18, 1968 | 6-0 | 79-83 | Missed Playoffs |
| 1967 | St. Louis Cardinals | Apr 20, 1967 | 6-0 | 101-60 | Won WS |
| 1966 | Cleveland Indians | Apr 29, 1966 | 10-0 | 81-81 | Missed Playoffs |
| 1965 | Detroit Tigers | Apr 17, 1965 | 3-0 | 89-73 | Missed Playoffs |
| Los Angeles Dodgers | Apr 17, 1965 | 2-0 | 97-65 | Won WS | |
| 1964 | Baltimore Orioles | Apr 19, 1964 | 4-0 | 97-65 | Missed Playoffs |
| 1963 | San Francisco Giants | Apr 14, 1963 | 4-0 | 88-74 | Missed Playoffs |
| St. Louis Cardinals | Apr 14, 1963 | 3-0 | 93-69 | Missed Playoffs | |
| 1962 | Pittsburgh Pirates | Apr 23, 1962 | 10-0 | 93-68 | Missed Playoffs |
| 1961 | Cincinnati Reds | Apr 15, 1961 | 3-0 | 93-61 | Lost WS |
| Minnesota Twins | Apr 15, 1961 | 2-0 | 70-90 | Missed Playoffs | |
| Kansas City Athletics | Apr 15, 1961 | 1-0* | 61-100 | Missed Playoffs | |
| Los Angeles Angels | Apr 15, 1961 | 1-0* | 70-91 | Missed Playoffs | |
| 1960 | Detroit Tigers | Apr 26, 1960 | 5-0 | 71-83 | Missed Playoffs |
| 1959 | Cleveland Indians | Apr 19, 1959 | 6-0 | 89-65 | Missed Playoffs |
| 1958 | Chicago Cubs | Apr 20, 1958 | 4-0 | 72-82 | Missed Playoffs |
| 1957 | Milwaukee Braves | Apr 23, 1957 | 5-0 | 95-59 | Won WS |
| Chicago White Sox | Apr 23, 1957 | 4-0 | 90-64 | Missed Playoffs | |
| 1956 | Chicago White Sox | Apr 21, 1956 | 3-0 | 85-69 | Missed Playoffs |
| Milwaukee Braves | Apr 21, 1956 | 3-0 | 92-62 | Missed Playoffs | |
| 1955 | Brooklyn Dodgers | Apr 22, 1955 | 10-0 | 98-55 | Won WS |
| 1954 | Cincinnati Redlegs | Apr 17, 1954 | 2-0 | 74-80 | Missed Playoffs |
| 1953 | Brooklyn Dodgers | Apr 17, 1953 | 2-0 | 105-49 | Lost WS |
| Cleveland Indians | Apr 17, 1953 | 2-0 | 92-62 | Missed Playoffs | |
| Milwaukee Braves | Apr 17, 1953 | 2-0 | 92-62 | Missed Playoffs | |
| Boston Red Sox | Apr 17, 1953 | 1-0 | 84-69 | Missed Playoffs | |
| 1952 | Cleveland Indians | Apr 22, 1952 | 7-0 | 93-61 | Missed Playoffs |
| 1951 | Washington Senators | Apr 21, 1951 | 4-0 | 62-92 | Missed Playoffs |
| Chicago White Sox | Apr 21, 1951 | 3-0 | 81-73 | Missed Playoffs | |
| Cleveland Indians | Apr 21, 1951 | 3-0 | 93-61 | Missed Playoffs | |
| Pittsburgh Pirates | Apr 21, 1951 | 2-0 | 64-90 | Missed Playoffs | |
| 1950 | Chicago Cubs | Apr 28, 1950 | 3-0* | 64-89 | Missed Playoffs |
| 1949 | New York Yankees | Apr 23, 1949 | 4-0 | 97-57 | Won WS |
| 1948 | Cleveland Indians | May 1, 1948 | 6-0 | 97-58 | Won WS |
| 1947 | Chicago White Sox | Apr 23, 1947 | 3-0* | 70-84 | Missed Playoffs |
| 1946 | Boston Red Sox | Apr 21, 1946 | 5-0 | 104-50 | Lost WS |
| 1945 | Chicago White Sox | Apr 29, 1945 | 5-0 | 71-78 | Missed Playoffs |
| 1944 | St. Louis Browns | Apr 29, 1944 | 9-0 | 89-65 | Lost WS |
| 1943 | New York Yankees | Apr 27, 1943 | 3-0 | 98-56 | Won WS |
| 1942 | Boston Braves | Apr 18, 1942 | 4-0 | 59-89 | Missed Playoffs |
| New York Yankees | Apr 18, 1942 | 4-0 | 103-51 | Lost WS | |
| St. Louis Browns | Apr 18, 1942 | 4-0 | 82-69 | Missed Playoffs | |
| 1941 | Boston Red Sox | Apr 21, 1941 | 5-0 | 84-70 | Missed Playoffs |
| 1940 | Brooklyn Dodgers | May 1, 1940 | 9-0 | 88-65 | Missed Playoffs |
| 1939 | Cleveland Indians | Apr 23, 1939 | 2-0* | 87-67 | Missed Playoffs |
| St. Louis Browns | Apr 23, 1939 | 1-0* | 43-111 | Missed Playoffs | |
| 1938 | Pittsburgh Pirates | Apr 26, 1938 | 7-0 | 86-64 | Missed Playoffs |
| 1937 | Pittsburgh Pirates | Apr 27, 1937 | 4-0 | 86-68 | Missed Playoffs |
| 1936 | New York Giants | Apr 20, 1936 | 5-0 | 92-62 | Lost WS |
| 1935 | Cleveland Indians | Apr 21, 1935 | 2-0 | 82-71 | Missed Playoffs |
| 1934 | Chicago Cubs | Apr 26, 1934 | 7-0 | 86-65 | Missed Playoffs |
| 1933 | New York Yankees | Apr 23, 1933 | 7-0 | 91-59 | Missed Playoffs |
| 1932 | Washington Senators | Apr 16, 1932 | 3-0 | 93-61 | Missed Playoffs |
| Philadelphia Phillies | Apr 16, 1932 | 2-0 | 78-76 | Missed Playoffs | |
| 1931 | Boston Braves | Apr 19, 1931 | 4-0 | 64-90 | Missed Playoffs |
| St. Louis Cardinals | Apr 19, 1931 | 4-0 | 101-53 | Won WS | |
| 1930 | New York Giants | Apr 28, 1930 | 7-0 | 87-67 | Missed Playoffs |
| 1929 | Boston Braves | Apr 23, 1929 | 3-0 | 56-98 | Missed Playoffs |
| New York Giants | Apr 23, 1929 | 2-0* | 84-67 | Missed Playoffs | |
| 1928 | New York Yankees | Apr 19, 1928 | 4-0 | 101-53 | Won WS |
| 1927 | New York Yankees | Apr 19, 1927 | 6-0 | 110-44 | Won WS |
| 1926 | Chicago White Sox | Apr 17, 1926 | 3-0 | 81-72 | Missed Playoffs |
| 1925 | Cleveland Indians | Apr 21, 1925 | 5-0 | 70-84 | Missed Playoffs |
| 1924 | Boston Braves | Apr 19, 1924 | 1-0* | 53-100 | Missed Playoffs |
| 1923 | Cleveland Indians | Apr 24, 1923 | 6-0 | 82-71 | Missed Playoffs |
| 1922 | Cleveland Indians | Apr 19, 1922 | 5-0 | 78-76 | Missed Playoffs |
| 1921 | Chicago Cubs | Apr 19, 1921 | 3-0 | 64-89 | Missed Playoffs |
| 1920 | Chicago White Sox | Apr 27, 1920 | 6-0 | 96-58 | Missed Playoffs |
| 1919 | Cincinnati Reds | May 2, 1919 | 7-0 | 96-44 | Won WS |
| 1918 | New York Giants | Apr 27, 1918 | 9-0 | 71-53 | Missed Playoffs |
| 1917 | New York Giants | Apr 18, 1917 | 4-0 | 98-56 | Lost WS |
| 1916 | Boston Red Sox | Apr 18, 1916 | 4-0 | 91-63 | Won WS |
| Boston Braves | Apr 18, 1916 | 2-0 | 89-63 | Missed Playoffs | |
| 1915 | Philadelphia Phillies | Apr 24, 1915 | 8-0 | 90-62 | Lost WS |
| 1914 | Brooklyn Robins | Apr 21, 1914 | 3-0* | 75-79 | Missed Playoffs |
| Philadelphia Phillies | Apr 21, 1914 | 3-0* | 74-80 | Missed Playoffs | |
| 1913 | Washington Senators | Apr 22, 1913 | 5-0 | 90-64 | Missed Playoffs |
| 1912 | Cincinnati Reds | Apr 16, 1912 | 4-0 | 75-78 | Missed Playoffs |
| Philadelphia Athletics | Apr 16, 1912 | 3-0 | 90-62 | Missed Playoffs | |
| 1911 | Detroit Tigers | Apr 22, 1911 | 6-0 | 89-65 | Missed Playoffs |
| 1910 | Boston Doves | Apr 16, 1910 | 2-0 | 53-100 | Missed Playoffs |
| Cincinnati Reds | Apr 16, 1910 | 2-0 | 75-79 | Missed Playoffs | |
| Cleveland Naps | Apr 16, 1910 | 2-0 | 71-81 | Missed Playoffs | |
| Boston Red Sox | Apr 16, 1910 | 1-0 | 81-72 | Missed Playoffs | |
| 1909 | Detroit Tigers | Apr 20, 1909 | 5-0 | 98-54 | Lost WS |
| 1908 | Pittsburgh Pirates | Apr 19, 1908 | 3-0 | 98-56 | Missed Playoffs |
| 1907 | Chicago Cubs | Apr 18, 1907 | 3-0 | 107-45 | Won WS |
| 1906 | Cleveland Naps | Apr 21, 1906 | 3-0* | 89-64 | Missed Playoffs |
| 1905 | Philadelphia Athletics | Apr 22, 1905 | 5-0 | 92-56 | Lost WS |
| 1904 | New York Giants | Apr 21, 1904 | 4-0 | 106-47 | No Postseason |
| 1903 | Detroit Tigers | Apr 28, 1903 | 4-0 | 65-71 | Missed Playoffs |
| 1902 | St. Louis Browns | Apr 25, 1902 | 2-0* | 78-58 | No Postseason |
| 1901 | Washington Senators | May 1, 1901 | 4-0* | 62-72 | No Postseason |
| 1900 | Philadelphia Phillies | Apr 23, 1900 | 3-0 | 75-63 | No Postseason |
| 1899 | St. Louis Perfectos | Apr 26, 1899 | 7-0 | 84-67 | No Postseason |
| 1898 | Baltimore Orioles | Apr 21, 1898 | 3-0 | 96-53 | No Postseason |
| 1897 | Cincinnati Reds | Apr 29, 1897 | 6-0 | 76-56 | No Postseason |
| 1896 | Brooklyn Bridegrooms | Apr 18, 1896 | 2-0 | 58-73 | No Postseason |
| Chicago Colts | Apr 18, 1896 | 2-0 | 71-57 | No Postseason | |
| Pittsburgh Pirates | Apr 18, 1896 | 2-0 | 66-63 | No Postseason | |
| Washington Senators | Apr 18, 1896 | 2-0 | 58-73 | No Postseason | |
| 1895 | Cincinnati Reds | Apr 23, 1895 | 3-0 | 66-64 | No Postseason |
| Boston Beaneaters | Apr 23, 1895 | 2-0 | 71-60 | No Postseason | |
| 1894 | Baltimore Orioles | Apr 25, 1894 | 4-0 | 89-39 | No Postseason |
| 1893 | Cleveland Spiders | May 3, 1893 | 3-0 | 73-55 | No Postseason |
| 1892 | Boston Beaneaters | Apr 19, 1892 | 2-0 | 102-48 | No Postseason |
| New York Giants | Apr 19, 1892 | 2-0 | 71-80 | No Postseason | |
| 1891 | Boston Beaneaters | Apr 29, 1891 | 6-0 | 87-51 | No Postseason |
| 1890 | Pittsburgh Alleghenys | Apr 22, 1890 | 2-0 | 23-113 | No Postseason |
| 1889 | Philadelphia Quakers | Apr 29, 1889 | 1-0* | 63-64 | No Postseason |
| 1888 | Boston Beaneaters | May 1, 1888 | 9-0 | 70-64 | No Postseason |
| 1887 | Boston Beaneaters | May 4, 1887 | 4-0 | 61-60 | No Postseason |
| 1886 | Chicago White Stockings | May 4, 1886 | 3-0 | 90-34 | No Postseason |
| 1885 | Detroit Wolverines | May 8, 1885 | 3-0 | 41-67 | No Postseason |
All Major League Baseball Teams
Longest Championship Drought By City
All MLB stats, streaks, droughts and records are updated based on games played on or before May 15, 2024.
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