Orlando Magic guard Markelle Fultz, right, chases the ball with Boston Celtics center Daniel Theis during overtime on Aug. 9 in Lake Buena Vista, Fla. (AP file photo)

With four games called off this week already and more teams dealing with virus-related issues, the NBA and the National Basketball Players Association enacted additional rules Tuesday in the hope of keeping the season going safely.

For “at least the next two weeks,” the league and union said, players and team staff will have to remain at their residence when in their home markets and are prohibited from leaving their hotels when on the road — with exceptions primarily for practices and games.

“I’m all for anything we possibly can do to ramp up the safety,” said Miami coach Erik Spoelstra, whose team had the NBA-minimum eight players in Philadelphia on Tuesday night, mising eight for COVID-related reasons and another with injury. “Just because we want to proceed with our profession doesn’t mean that there isn’t a reality of what’s going on in the world. The virus is still very much out there.”

Orlando’s game in Boston for tonight is off, the fourth postponement since Sunday and the third involving the Celtics. Boston’s most recent list showed eight players as unavailable because they are adhering to the NBA’s health and safety protocols, which means they either tested positive or contact-tracing data showed they may have been exposed to someone who is positive.

“I’m for whatever the NBA wants us to do,” Washington coach Scott Brooks said.

All that is permitted in home markets, for now, is “to attend team-related activities at the team facility or arena, exercise outside, or perform essential activities,” the league and union said. On the road, team activities and emergencies are the only allowable reasons for leaving hotels.

NBPA executive director Michele Roberts said “it would be irresponsible and unacceptable” to not seek better ways to keep players safe.

“No one wants to see more restrictions imposed,” Roberts said. “No one also wants to see the infection rate increase if there are steps we can take to mitigate the risk.”