Bulldogs forward Aiden Tolman has been cleared of coronavirus, but the NRL's decision to postpone Sunday's clash between Canterbury Bulldogs and Sydney Roosters until Monday remains.
One of Tolman's children attends a school in the Sutherland Shire where a staff member has tested positive for Covid-19.
The primary school has closed until June 25 and students have been told to self-isolate.
Sunday's later game between St George Illawarra and Cronulla at Campbelltown Stadium - originally scheduled for 6.30pm - has been brought forward to the 4.05pm timeslot.
The Bulldogs-Roosters game will now be played at 7pm on Monday at Bankwest Stadium.
Bulldogs chief executive Andrew Hill said the decision to postpone the game was the right one.
"Once we found out about Aiden's situation we immediately informed the NRL and have been working with them overnight which ultimately led to the decision to postpone the game until tomorrow," he said.
"This is an unprecedented situation, but we will make sure that we take all the necessary precautions required and get everyone within our bubble tested and cleared over the next 24 hours."
Australian Rugby League chairman Peter V'landys said the Commission approved changes to the schedule to ensure the health and safety of the players and the community.
The NRL consulted its biosecurity expert who said the chance of the player being infected and passing it onto his teammates was highly unlikely.
V'landys said while the risk the virus had spread to the Bulldogs playing group was remote the Commission wanted absolute certainty before allowing the team to play.