CREATE TABLE table_203_689 (id NUMBER, "date" CLOB, "opponent" CLOB, "score" CLOB, "result" CLOB, "record" CLOB)

who did the mercury beat in their only 2ot game ?
SELECT "opponent" FROM table_203_689 WHERE "score" = '2ot'
SELECT "opponent" FROM "table_203_689" WHERE "score" = '2ot'