 He appeared in 156 games for Washington from 1936 to 1939, compiling a record of 34–43.On December 8, 1939, Appleton was traded by the Senators to the Chicago White Sox along with Taffy Wright in exchange for Gee Walker.Appleton appeared in 42 games as a relief pitcher for the White Sox from 1940 to 1942 while compiling a 4–3 record.