CREATE TABLE table_name_94 (score INT, country VARCHAR, player VARCHAR)

When Tom Purtzer of the United States played what is the maximum score?
SELECT MAX(score) FROM table_name_94 WHERE country = "united states" AND player = "tom purtzer"
SELECT MAX("score") FROM "table_name_94" WHERE "country" = "united states" AND "player" = "tom purtzer"