CREATE TABLE table_75881 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" TEXT)

What is the earliest week that the Texans played at the Cleveland Browns Stadium?
SELECT MIN("Week") FROM table_75881 WHERE "Game site" = 'cleveland browns stadium'
SELECT MIN("Week") FROM "table_75881" WHERE "Game site" = 'cleveland browns stadium'