It is the time of unknowns in the NFL. Rosters and coaching staffs have undergone varying degrees of change, and until they take the field (hopefully on schedule) we won’t know how each team’s preparation for the season will go. The Dallas Cowboys have one of the biggest turnovers on the coaching staff in the league. That means we are dealing with far more uncertainty than most in that aspect. We have a better idea of what the team has on the roster, since both the returning veterans and the free agent additions all have history to study, and even the rookies have their college careers to give us some indication of what they may bring to the table.