CREATE TABLE table_51444 ("Round" FLOAT, "Pick" FLOAT, "Position" TEXT, "Nationality" TEXT, "School/club team" TEXT)

Which Position has a Nationality of united states, and a Pick of 9?
SELECT "Position" FROM table_51444 WHERE "Nationality" = 'united states' AND "Pick" = '9'
SELECT "Position" FROM "table_51444" WHERE "Nationality" = 'united states' AND "Pick" = '9'