CREATE TABLE table_38517 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

Which Date has a Winning score of 14 (66-64-68-68=266)?
SELECT "Date" FROM table_38517 WHERE "Winning score" = '–14 (66-64-68-68=266)'
SELECT "Date" FROM "table_38517" WHERE "Winning score" = '–14 (66-64-68-68=266)'