CREATE TABLE table_37119 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Save" CLOB)

Who's the opponent when Diegomar Markwell is the loss?
SELECT "Opponent" FROM table_37119 WHERE "Loss" = 'diegomar markwell'
SELECT "Opponent" FROM "table_37119" WHERE "Loss" = 'diegomar markwell'