CREATE TABLE table_27618 ("Week" FLOAT, "Date" TEXT, "Kickoff" TEXT, "Opponent" TEXT, "Final score" TEXT, "Team record" TEXT, "Game site" TEXT, "Attendance" FLOAT)

In game site AOL Arena, who are all the opponents?
SELECT "Opponent" FROM table_27618 WHERE "Game site" = 'AOL Arena'
SELECT "Opponent" FROM "table_27618" WHERE "Game site" = 'AOL Arena'