CREATE TABLE table_53366 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Result" TEXT, "Attendance" TEXT, "Record" TEXT)

Who was the opponent in the Week 4 game?
SELECT "Opponent" FROM table_53366 WHERE "Week" = '4'
SELECT "Opponent" FROM "table_53366" WHERE "Week" = '4'