On Jan. 14, 2020, for the sixth time ever and the first time in more than 40 years, there was only one manager who had won a World Series on the team he currently managed (Dave Martinez of the Nationals).
Dave Roberts of the Dodgers became the second active incumbent World Series-winning manager on Oct. 27. Still, going from six such managers at the end of 2019 to just two in 2020 is the biggest-ever decline from the end of one season to the next.
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