Irving has not been with the Nets for any of their practices in New York, where professional athletes are required to be vaccinated against COVID-19 to practice or play.
The Nets are prevented by law from revealing whether he has been vaccinated, but they listed him as "ineligible to play" in the injury report for their preseason game Friday against Milwaukee.
There is nothing related to the NBA that would cause a player to have that designation.
Unless Irving is vaccinated, he would have to miss the Nets' 41 home games and their two road games against the New York Knicks. The NBA has said he wouldn't be paid for any of those games.
He practiced with the Nets last week when they held training camp in San Diego, but he hasn't been with the team since it returned home.