Thomas Augustus Long (June 1, 1890 – June 23, 1972), was a professional baseball outfielder in the Major Leagues from 1911–1917.

He played for the Washington Senators and St. Louis Cardinals.

In 418 games over five seasons, Long posted a .269 batting average (401-for-1489) with 148 runs, 6 home runs and 140 RBI.

He finished his career with a .928 fielding percentage at all three outfield positions.

This biographical article relating to an American baseball outfielder born in the 1890s is a stub.