700 or better winning percentages, as there was less of the evening-out effect of a longer season, and some seasons had multiple teams, with three in 1884 (between the three leagues that year) and in 1885. With shorter schedules (fewer than 100 games before 1884), it was more common for teams to finish with. *- Due to the COVID-19 pandemic, the season was shortened to 60 games. 700 or higher in a full season (which requires 114 or more wins): the 1998 New York Yankees and the 2001 Seattle Mariners. Since the season was expanded to 162 games in 1961, only two teams have managed a winning percentage of.
Listed below are the Major League Baseball teams with the best season win–loss records, as determined by winning percentage (.700 or better).
