Walter "Biff" Schaller (September 23, 1889 – October 9, 1939) was an American baseball outfielder.
He played professional baseball for 11 seasons from 1910 to 1920, including two seasons in Major League Baseball for the Detroit Tigers in 1911 and the Chicago White Sox in 1913 and seven seasons in the Pacific Coast League from 1913 to 1917 and 1919 to 1920.