CREATE TABLE table_name_15 (score_final INT, competition_description VARCHAR, year VARCHAR)

What is the lowest final score of the American Cup competition before 2009?
SELECT MIN(score_final) FROM table_name_15 WHERE competition_description = "american cup" AND year < 2009
SELECT MIN("score_final") FROM "table_name_15" WHERE "american cup" = "competition_description" AND "year" < 2009