The Memphis Grizzlies banned Ja Morant from all team activities after an Instagram video showed him clutching a pistol.
The video's date and Morant's location are unknown. Morant has held a gun on social media twice.
The Grizzlies player livestreamed himself brandishing a pistol at a Denver bar on Instagram in March.
That earned him an eight-game NBA suspension without pay. Police did not charge Morant.