PFF analysts Steve Palazzolo and Sam Monson discuss the news that one of the best guards in the NFL Zack Martin recently tested positive for Covid-19 and will be out for the Dallas Cowboys' first game against the Tampa Bay Buccaneers this Thursday night. Given the uncertainty around quarterback Dak Prescott's injury situation and Zack Martin's unavailability, should Cowboys fans start to get worried about the start of the season?