The competition was united again in 1920 when the Newcastle Rugby League (NRL) was formed.
The Newcastle Sports Ground (No1) was officially opened 16 Sept 1922 on land donated by the Australian Agricultural Company. The opening was marked by a game between Western Suburbs (Sydney) and Newcastle. Newcastle defeated the Sydney team 20 to 16.
The first game of rugby league under lights was played at the Newcastle Coursing and Sporting Club (later the Newcastle Greyhound Track) at Hamilton South in 1928. Four clubs participated in the competition, North, South, Central and Waratah, billed as being “under brilliant electric light”.
Rees Duncan (Snr.) Kurri Kurri and W. ‘Boki’ Bell (Central) were the only Newcastle players to play against four consecutive visiting English teams – 1920,1924,1928,1932.
Northern Suburbs won four premierships 1920, 1925, 1926, 1929
Western Suburbs in 1922, Eastern Suburbs in 1923, 1924, Central in 1921, 1928 and South Newcastle in 1927 also won premierships in this decade.
Kurri Kurri joined the competition in 1926.
In 1927 Waratah-Mayfield was admitted and the addition of two coalfield teams, Maitland United and Morpeth-East Maitland, from the Hunter Valley Rugby League competition, increased the number of participating clubs to nine.
1920 25th August England defeated Newcastle 17-10
1920 28th August England defeated Newcastle 24-3
1921 New Zealand defeated Newcastle 27-14
1924 England defeated Newcastle 43-18
1926 Queensland defeated New South Wales 26-11 at the No.1 Sportsground
1928 England defeated Newcastle 19-17