New South Wales Premier League Sporting club or association Top tier league of men's soccer which consists of 12 teams competing in a round-robin competition. Milestone Formed 1957 {"name":"Formed","target":"","target_text":null,"date":{"#markup":"<span class='date'>1957<\/span>"},"date_start":"1957","date_end":"1957"} Type Sporting club or association {"name":"Sporting club or association","target":"","target_text":null,"date":{"#markup":"<span class='date'><\/span>"},"date_start":null,"date_end":null}