CREATE TABLE table_204_644 (id DECIMAL, "week" DECIMAL, "date" TEXT, "opponent" TEXT, "result" TEXT, "record" TEXT, "game site" TEXT, "bye" TEXT)

who was the opponent previous to the south georgia wildcats ?
SELECT "opponent" FROM table_204_644 WHERE "date" < (SELECT "date" FROM table_204_644 WHERE "opponent" = 'south georgia wildcats') ORDER BY "date" DESC LIMIT 1
SELECT "opponent" FROM "table_204_644" WHERE "date" < (SELECT "date" FROM "table_204_644" WHERE "opponent" = 'south georgia wildcats') ORDER BY "date" DESC NULLS LAST LIMIT 1