Eastern Suburbs (now known as the Sydney Roosters) competed in the 13th New South Wales Rugby League (NSWRL) premiership in 1920.

• Home Ground: Agricultural Ground
• Lineup:-

• premiership Round 1, Saturday 1 May 1920;

Balmain 9 (Potter try; Craig 3 goals defeated Eastern Suburbs 7 (Caples try; Messenger goal; Challis field goal) at the Sydney Cricket Ground.

• Premiership Round 2, Saturday 8 May 1920;

Eastern Suburbs 19 (Wright 2, Cameron tries; Wally Messenger 3; Caples 2 goals) defeated Newtown 7 (Boys try; Boys goal) at the Agricultural Society Ground.

• Premiership Round 3, Saturday 15 May 1920;

Eastern Suburbs 44 (Wright, Warkins 2, Cameron, Messenger, Norman, Williams tries ; Messenger 7 goals) defeated University 8 (Callan, Satterthwaite tries) at Agricultural Society Ground.

• Premiership Round 4, Saturday 22 May 1920

Eastern Suburbs 20 defeated Glebe 5 at Agricultural Ground.

• Premiership Round 5, Saturday 29 May 1920;

Eastern Suburbs 18 defeated Western Suburbs 14 at Sydney Cricket Ground.

A crowd of 30,000 watched Easts defeat Wests.

• Premiership Round 6, Thursday 17 June 1920;

Eastern Suburbs 42 defeated Annandale 10 at Sydney Cricket Ground No. 2

Premiership Round 7, Bye:

Premiership Round 8, Saturday 26 June 1920 Eastern Suburbs 12 defeated North Sydney 8 at Sydney Cricket Ground.

Premiership Round 9, Saturday 17 July 1920 - South Sydney 14 defeated Eastern Suburbs 11 at Agricultural Ground.

• Premiership Round 10, Saturday 24 July 1920,

Eastern Suburbs 30 Wright 5 + 1 Tries; 6 Goals) defeated Balmain 13 at the Agricultural Ground.

Eastern Suburbs were the only side to defeat Balmain in the 1920 season.

• Premiership Round 11, Saturday 31 July 1920;

Newtown 8(???) defeated Eastern Suburbs 0 at Agricultural Ground;

• Premiership Round 12, Saturday 7 August 1920;

North Sydney 21 defeated Eastern Suburbs 10 at Sydney Cricket Ground

• Premiership Round 13, Saturday 21 August 1920 - Glebe 29 defeated Eastern Suburbs 21 at Sydney Cricket Ground.
• Premiership Round 14, Saturday 28 August 1920 - Western Suburbs 29 defeated Eastern Suburbs 5 at Sydney Cricket Ground;
• Premiership Round 15, Wednesday 1 September 1920;

Eastern Suburbs 15 defeated Annandale 0 at Sydney Cricket Ground No.2.

• Won Presidents Cup
• Gordon Wright was once again the NSWRL's leading try scorer.
• Representatives:- Harry Caples (NSW), Sid Pearce (Australia, NSW).