Cowboys QB Dak Prescott does work with training ball

Injured Dallas Cowboys quarterback Dak Prescott was back at practice Thursday ... gripping and throwing a training ball.

Prescott did not throw a football or take any snaps. But his presence at practice, 10 days removed from surgery on his right thumb, comes a day after owner Jerry Jones said Prescott could be back at full practice in two weeks.

That projection is well ahead of initial estimates of Prescott's return in