CREATE TABLE table_204_399 (id DECIMAL, "outcome" TEXT, "no." DECIMAL, "year" DECIMAL, "championship" TEXT, "opponent in the final" TEXT, "score" TEXT)

what did he do more - win or finish as a runner up ?
SELECT "outcome" FROM table_204_399 GROUP BY "outcome" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "outcome" FROM "table_204_399" GROUP BY "outcome" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1