Williams was playing for the second straight game Saturday night after missing four with a left hamstring strain. He also missed time in the preseason with hamstring issues.
Williams left the game with 1:11 remaining in the third quarter.
J.J. Barea started for the sixth straight game since Williams' original injury. Williams came off the bench for the second straight night. Dallas was backing a back-to-back after losing in Miami.
Williams had 11 points, three assists and four turnovers in 21 minutes before leaving against the Pelicans.