After an undistinguished ML trial as an outfielder, Hendricks began managing in the minors in 1906. Beginning in 1910, he won three straight pennants with Denver in the Western League, then managed at Indianapolis in the American Association for four years. When Miller Huggins was fired by the 16 x x Cardinals, Hendricks signed a two-year contract to replace him, finished last in 1918, and resigned to become athletic director for the Knights of Columbus. He went to France in 1919, then spent five more years as manager at Indianapolis. When Reds manager Pat Moran died in March of 1924, Hendricks took over the Cincinnati job. He finished second, only two games behind the Cardinals in 1926. Educated as a lawyer at North Christian University, he never practiced.