Joseph J. O'Brien
Joe O'Brien was an umpire in the American League in 1912 and briefly in 1914, then joined the Federal League in 1915.
He had begun working professionally in the Ohio State League in 1912. After his stint in the majors, he worked in the Western League in 1915, the American Association in 1916, the International League from 1917 to 1922 and the Western League again in 1923 and 1925.
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