According to Shams Charania of The Athletic, Josh Richardson has been traded to the Boston Celtics after he opted in to his player option.
The Dallas Mavericks are finalizing trading G/F Josh Richardson to the Boston Celtics, sources tell @TheAthletic @Stadium. Richardson is exercising his $11.6 million player option for the 2021-22 season for the deal.
— Shams Charania (@ShamsCharania) July 31, 2021
His colleague John Hollinger notes that this is a one way trade, with Boston able to absorb Richardson into the trade exception generated from the Gordon Hayward trade to the Charlotte Hornets last year.