CREATE TABLE table_77285 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What was the result before week 13 when they played the Oakland Raiders?
SELECT "Result" FROM table_77285 WHERE "Week" < '13' AND "Opponent" = 'oakland raiders'
SELECT "Result" FROM "table_77285" WHERE "Opponent" = 'oakland raiders' AND "Week" < '13'