CREATE TABLE table_11449590_2 (kickoff_ VARCHAR2, a_ VARCHAR2, opponent VARCHAR2)

Which kickoff has the opponent at new orleans saints?
SELECT kickoff_ AS "a_" FROM table_11449590_2 WHERE opponent = "at New Orleans Saints"
SELECT "kickoff_" AS "a_" FROM "table_11449590_2" WHERE "at New Orleans Saints" = "opponent"