CREATE TABLE table_11714 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

Which Opponent has a Date of september 28, 1951?
SELECT "Opponent" FROM table_11714 WHERE "Date" = 'september 28, 1951'
SELECT "Opponent" FROM "table_11714" WHERE "Date" = 'september 28, 1951'