CREATE TABLE table_39462 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game Site" TEXT, "Attendance" FLOAT)

What was the lowest attendance at a game against the St. Louis Cardinals?
SELECT MIN("Attendance") FROM table_39462 WHERE "Opponent" = 'st. louis cardinals'
SELECT MIN("Attendance") FROM "table_39462" WHERE "Opponent" = 'st. louis cardinals'