CREATE TABLE table_77531 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Game site" CLOB, "Attendance" CLOB)

Who did the Jets play in their post-week 15 game?
SELECT "Opponent" FROM table_77531 WHERE "Week" > '15'
SELECT "Opponent" FROM "table_77531" WHERE "Week" > '15'