CREATE TABLE table_5882 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Location" CLOB)

Who was the opponent that led to a record of 23-5?
SELECT "Opponent" FROM table_5882 WHERE "Record" = '23-5'
SELECT "Opponent" FROM "table_5882" WHERE "Record" = '23-5'