CREATE TABLE table_39603 ("Year" FLOAT, "Championship" TEXT, "54 Holes" TEXT, "Winning Score" TEXT, "Margin" TEXT, "Runner ( s ) -up" TEXT)

Which championship has a winning score of (77-76-74-73=300)?
SELECT "Championship" FROM table_39603 WHERE "Winning Score" = '(77-76-74-73=300)'
SELECT "Championship" FROM "table_39603" WHERE "Winning Score" = '(77-76-74-73=300)'