CREATE TABLE table_17708 ("Club" TEXT, "Overall Record" TEXT, "Goals For" FLOAT, "Goals For Avg." TEXT, "Goals Against" FLOAT, "Goals Against Avg." TEXT)

The Kansas City Wizards had a 9-10-9 record and what goals against avg?
SELECT "Goals Against Avg." FROM table_17708 WHERE "Overall Record" = '9-10-9'
SELECT "Goals Against Avg." FROM "table_17708" WHERE "Overall Record" = '9-10-9'