Robert Lyndon "Ziggy" Hasbrook (né Hasbrouck; November 21, 1893 – February 9, 1976) was an American professional baseball player.

He played parts of two seasons in Major League Baseball for the 1916 and 1917 Chicago White Sox, primarily as a first baseman.

Hasbrook played only 11 games for the White Sox, making his debut at age 22 on September 6, 1916.

His great-great-grandfather, Elias Hasbrouck, served as a Captain during the American Revolutionary War, and as Supervisor of the Town of Woodstock, New York, from 1788 to 1791.

Three of his ancestors were patentees, or founders, of New Paltz, New York: Abraham Hasbrouck, Christian Deyo and Antoine Crispell.