A second MRI taken on Dak Prescott’s ailing shoulder showed that the injury is healing well, but didn’t offer any clarity on whether the Cowboys QB will be back at practice Monday or ready to play in the team’s next preseason game.A second MRI taken on Dak Prescott’s ailing shoulder showed that the injury is healing well, but didn’t offer any clarity on whether the Cowboys QB will be back at practice Monday or ready to play in the team’s next preseason game.Read Morewww.espn.com – NFL