CREATE TABLE table_69056 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Record" TEXT)

Who lost when the mariners played on September 12?
SELECT "Loss" FROM table_69056 WHERE "Opponent" = 'mariners' AND "Date" = 'september 12'
SELECT "Loss" FROM "table_69056" WHERE "Date" = 'september 12' AND "Opponent" = 'mariners'