CREATE TABLE table_77439 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game site" TEXT)

What team was the opponent in a week earlier than 17 on June 17, 2006?
SELECT "Opponent" FROM table_77439 WHERE "Week" < '17' AND "Date" = 'june 17, 2006'
SELECT "Opponent" FROM "table_77439" WHERE "Date" = 'june 17, 2006' AND "Week" < '17'