Frederick Orin Hartman (April 21, 1868 – November 11, 1938) was an American professional baseball third baseman.

He played in Major League Baseball (MLB) for the Pittsburgh Pirates, St. Louis Browns, New York Giants, Chicago White Sox, and St. Louis Cardinals.

[1] In six seasons, Hartman posted a .278 batting average (623-for-2242) with 10 home runs and 333 runs batted in in 582 games played.

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