CREATE TABLE table_42634 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What tournament had a winning score of 27 (64-64-61=189)?
SELECT "Tournament" FROM table_42634 WHERE "Winning score" = '−27 (64-64-61=189)'
SELECT "Tournament" FROM "table_42634" WHERE "Winning score" = '−27 (64-64-61=189)'