John Avery Haldeman (December 2, 1855 to September 17, 1899) was a Major League Baseball second baseman. Haldeman played for the Louisville Grays in the 1877 season. He played just one game in his career, having no hits in four at-bats.
Haldeman was born in Pewee Valley, Kentucky and died in Louisville, Kentucky.
He was an alumnus of Washington and Lee University.
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