The SSE Airtricity League has postponed Premier Division leaders Shamrock Rovers' next three fixtures after Aaron Greene and Republic of Ireland international Jack Byrne tested positive for Covid-19.
The Hoops had revealed that "several other players within the squad will follow a period of isolation as close contacts" to their team-mates.
Byrne tested positive while on international duty and is self-isolating in Dublin.
He did not travel to Finland for the Nations League game following a positive test on Sunday.
Shamrock Rovers had been due to host Derry City on Friday night and Dublin rivals St Patrick's Athletic a week later, with an away trip to Finn Harps on Monday also now having to be rescheduled.
Meanwhile, Bohemians have confirmed that two first-team players are self-isolating following a positive Covid-19 result, but have made no request for Friday's game away to Dundalk to be rescheduled and say they "are happy that the fixture will proceed as planned."
One unnamed first-team player has tested positive for the Gypsies and another, deemed a close contact, is also self-isolating as a result.
The player who tested positive last trained with the team on 6 October, was tested on 10 October and received his result on Monday.
He will remain in self-isolation and following all public health guidelines until he is permitted to resume training on Tuesday, 20 October.
The close contact returned a negative test for Covid-19 and will also resume training on that date.