CREATE TABLE table_20496 ("No." FLOAT, "Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "To par" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

Who was the runner-up in the Memorial Tournament?
SELECT "Runner(s)-up" FROM table_20496 WHERE "Tournament" = 'Memorial Tournament'
SELECT "Runner(s)-up" FROM "table_20496" WHERE "Tournament" = 'Memorial Tournament'