<P> This is a list of the longest team winning streaks or unbeaten streaks in Major League Baseball history . Streaks started at the end of one season are carried over into the following season . The lists below include streaks that consist entirely of regular - season games, streaks from the predecessor National Association (1871--1875), streaks of playoff games and World Series games, and streaks that include both regular - season and postseason games . </P> <P> The 1916 New York Giants hold the record for the longest unbeaten streak in MLB history at 26, with a tie in - between the 14th and 15th win . The record for the longest winning streak by an American League team is held by the 2017 Cleveland Indians at 22 . The Chicago Cubs franchise has won 21 games twice, once in 1880 when they were the Chicago White Stockings and once in 1935 . </P> <P> The longest winning streak consisting only of playoff games stands at 12 consecutive wins, by the 1927, 1928 and 1932 New York Yankees (who swept the World Series all three seasons) and tied by the 1998--99 Yankees . For streaks that have included both regular and postseason games, the 1970 and 1971 Baltimore Orioles hold the top two positions with 17 and 16 consecutive victories, respectively . </P> <P> Several entries in the table are denoted as including ties . In the early days of baseball, a game that was postponed due to weather or darkness was replayed from the beginning (instead of being resumed from that point), but all statistics from the game were counted . In official records, the game is unofficial but is listed as a tie . </P>

When was the last time the pirates won 11 games in a row