CREATE TABLE table_56290 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Save" CLOB)

Who was the opponent on September 28?
SELECT "Opponent" FROM table_56290 WHERE "Date" = 'september 28'
SELECT "Opponent" FROM "table_56290" WHERE "Date" = 'september 28'