Gafford went back to the locker room during Saturday's game against the Clippers for undisclosed reasons, Grant Afseth of DallasHoopsJournal.com reports.
It's unclear what caused Gafford to exit the game, but it's not certain that he'll be able to return. While he's sidelined, Marvin Bagley and Dwight Powell could see an uptick in playing time.