CREATE TABLE table_15021 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Record" CLOB)

Who was the opponent at the game that had a loss of Stieb (5-7)?
SELECT "Opponent" FROM table_15021 WHERE "Loss" = 'stieb (5-7)'
SELECT "Opponent" FROM "table_15021" WHERE "Loss" = 'stieb (5-7)'