Just two weeks separate Saturday’s third and final preseason game and the opener against the Cleveland Browns for the Dallas Cowboys. To this point, there has been no sign of wide receiver CeeDee Lamb amid contract discussions with the team. Dallas has been without their star wide receiver all training camp and questions about his Week 1 availability are beginning to be asked. Head coach Mike McCarthy says the Cowboys will have a “healthy plan” if Lamb does not play Week 1. Being without the NFL’s top pass catcher from a year ago would be a brutal blow for Dak Prescott and the entire offense. …