Frederick Harvey "Tommy" Thomas (December 19, 1892 – January 15, 1986) was an American professional baseball third baseman.

He played in Major League Baseball (MLB) from 1918 to 1920 for the Boston Red Sox, Philadelphia Athletics, and Washington Senators.

In 1916, Thomas was acquired by the Boston Red Sox with Sam Jones from the Cleveland Indians in exchange for Tris Speaker.

He entered the majors in 1918, hitting .257 in 44 games, and was a member of the World Champions Red Sox in the 1918 Series.

He has been credited for starting the tradition of standing during playing of the National Anthem at baseball games, at the 1918 Series.