Robert Lyndon "Ziggy" Hasbrook (né Hasbrouck; November 21, 1893 – February 9, 1976) was a 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. He made his final professional appearance on September 27, 1917.