The NBA Players Association voted to form a union for G League players, league sources told Shams Charania of The Athletic.
The next step is for formal approval at the G League level.
G League president Shareef Abdur-Rahim has previously voiced his support for a players union.
"We support the players' right to unionize. We view this as a positive thing and are looking to continue to grow our league for the players to develop and accomplish their dreams," said Abdur-Rahim.