CREATE TABLE table_53553 ("Name" TEXT, "Position" TEXT, "From  ( Club ) " TEXT, "Date Joined" TEXT, "Debut" TEXT)

What round was the debut of defender Stephen Laybutt?
SELECT "Debut" FROM table_53553 WHERE "Position" = 'defender' AND "Name" = 'stephen laybutt'
SELECT "Debut" FROM "table_53553" WHERE "Name" = 'stephen laybutt' AND "Position" = 'defender'