CREATE TABLE table_48027 ("Place" TEXT, "Player" TEXT, "Country" TEXT, "Score" TEXT, "To par" TEXT)

What is Score, when Country is 'United States', and when Player is 'John Mahaffey'?
SELECT "Score" FROM table_48027 WHERE "Country" = 'united states' AND "Player" = 'john mahaffey'
SELECT "Score" FROM "table_48027" WHERE "Country" = 'united states' AND "Player" = 'john mahaffey'