R. Emmet "Snags" Heidrick (July 29, 1876 – January 20, 1916) was an American professional baseball player.

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.

Feeling that a good team could draw better attendance in St. Louis than in Cleveland, the Robison brothers traded Heidrick and several other Spiders players to the Perfectos.

Heidrick, Bobby Wallace and Jack Harper signed with the St. Louis Browns, but Frank Robison claimed to still have them under contract.

[4] After three years with the Browns, Heidrick retired in 1904 and joined the lumber business run by his family.