CREATE TABLE table_11903 ("Week" TEXT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Kickoff [a ]" TEXT, "Game site" TEXT, "Attendance" TEXT, "Record" TEXT)

Who was the opponent for the giants stadium game?
SELECT "Opponent" FROM table_11903 WHERE "Game site" = 'giants stadium'
SELECT "Opponent" FROM "table_11903" WHERE "Game site" = 'giants stadium'