CREATE TABLE table_8123 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

Which Runner(s)-up has a Tournament of cameron park open?
SELECT "Runner(s)-up" FROM table_8123 WHERE "Tournament" = 'cameron park open'
SELECT "Runner(s)-up" FROM "table_8123" WHERE "Tournament" = 'cameron park open'