CREATE TABLE table_name_3 (date_of_appointment VARCHAR(255), position_in_table VARCHAR(255), replaced_by VARCHAR(255))
WHAT IS THE APPOINTMENT DATE WITH A PRE-SEASON POSITION, AND REPLACED BY THOMAS THOMASBERG?
    
SQL: SELECT date_of_appointment FROM table_name_3 WHERE position_in_table = "pre-season" AND replaced_by = "thomas thomasberg"