CREATE TABLE table_name_53 (established NUMBER, championships VARCHAR2, club VARCHAR2)

Name the average established for championships less than 1 and club of erie seawolves
SELECT AVG(established) FROM table_name_53 WHERE championships < 1 AND club = "erie seawolves"
SELECT AVG("established") FROM "table_name_53" WHERE "championships" < 1 AND "club" = "erie seawolves"