R. Emmet "Snags" Heidrick (July 29, 1876 – January 20, 1916) was an outfielder in Major League Baseball from 1898 to 1908. He played for the Cleveland Spiders, St. Louis Cardinals, and St. Louis Browns. He was known as a good defensive player who hit for a high batting average but he missed a great deal of playing time due to injuries. Heidrick stood out among early baseball players because he came from a wealthy family. His father, Levi Heidrick, was a successful businessman, and his son, Gardner Heidrick, co-founded an executive search firm.