CREATE TABLE table_51154 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Result" TEXT, "Record" TEXT, "Attendance" FLOAT)

What is the Opponent of the Game on October 20?
SELECT "Opponent" FROM table_51154 WHERE "Date" = 'october 20'
SELECT "Opponent" FROM "table_51154" WHERE "Date" = 'october 20'