CREATE TABLE table_204_747 (id DECIMAL, "season" TEXT, "skip" TEXT, "third" TEXT, "second" TEXT, "lead" TEXT, "events" TEXT)

who had the most seasons in third ?
SELECT "third" FROM table_204_747 GROUP BY "third" ORDER BY COUNT("season") DESC LIMIT 1
SELECT "third" FROM "table_204_747" GROUP BY "third" ORDER BY COUNT("season") DESC NULLS LAST LIMIT 1