Cleveland Guardians
In the 1990s, the then-Indians were in the postseason several times.  They made it to the World Series in 1995 and 1997 but lost to the Atlanta Braves and the Florida Marlins respectively.  They returned to the World Series in 2016, and again they lost, this time to the Chicago Cubs in seven games.  In 2017, they set an American League record of winning 22 straight games.  They won 102 games during the season.  However, they lost to the New York Yankees in the Division Series.