<P> The 1899 Cleveland Spiders own the worst single - season record of all time ( minimum 120 games ) and for all eras , finishing at 20 -- 134 (. 130 percentage ) in the final year of the National League 's 12 - team era in the 1890s ; for comparison , this projects to 21 -- 141 under the current 162 - game schedule , and Pythagorean expectation based on the Spiders ' results and the current 162 - game schedule predicts a record of 25 -- 137 . </P>
<P> The 1899 Cleveland Spiders own the worst single - season record of all time ( minimum 120 games ) and for all eras , finishing at 20 -- 134 (. 130 percentage ) in the final year of the National League 's 12 - team era in the 1890s ; for comparison , this projects to 21 -- 141 under the current 162 - game schedule , and Pythagorean expectation based on the Spiders ' results and the current 162 - game schedule predicts a record of 25 -- 137 . </P>
who has the worst record in baseball history
who has the worst record in baseball history
1899 Cleveland Spiders
1899 Cleveland Spiders