By Chris Rosvoglou The Dallas Cowboys have a crucial matchup against the Philadelphia Eagles coming up this weekend. However, Dak Prescott is not expected to make his return this Sunday. Cowboys head coach Mike McCarthy said the team is preparing for Cooper Rush to start. Prescott is improving each day, but he has not been medically cleared yet. McCarthy revealed that Prescott is a bit disappointed that he won’t start on Sunday against the Eagles. “I know Dak didn’t want to hear it,” McCarthy said. “You’ve got to make sure that he’s right for the long haul, too. Not that I’m saying we’re being…