Chris Lynn says he was "lulled into a false sense of security" before a COVID-19 protocol breach in Canberra that meant he had to keep his distance in Sunday's BBL clash.
In a statement on Monday, the Brisbane Heat captain admitted to taking a photo with a member of public at a licensed venue and catching a taxi.
The incident was brought to light in the hours before the Heat's clash with the Sydney Thunder.
Lynn and English teammate Daniel Lawrence were still allowed to play but forced to keep their distance from other players and officials.
Queensland Cricket CEO Terry Svenson confirmed they were continuing to work with Cricket Australia to resolve the matter, while Lynn expressed his regret and appreciation for being allowed to play.
"I would like to say sorry to my teammates, the club and the Heat fans for being careless and not observing the protocols that were put in place to ensure the continuity of the competition," he said.
"Having a photo with a fan at a licensed venue and travelling in taxi seem pretty low risk but they were identified in our briefings as examples of things you couldn't do."
"I was probably lulled into a false sense of security that because everything has been improving around the country we were getting closer to normal behaviour.''
"But the rules, including avoiding close contact, are there to protect the BBL competition and all the players and teams and I do apologise sincerely to everyone for jeopardising that."
The incident was cricket's first COVID-19 protocol breach - after the WBBL tournament and two international white-ball series between Australia and India were played without incident.
The two countries will begin their four-Test series in Adelaide on Thursday.
