The Dallas Cowboys have many defensive needs that they must address in this 2021 7-Round Mock Draft. But with the No. 10 overall pick in the 2021 NFL Draft, they need to take the player they feel most confident will give them 10 years as a good professional player at a position of relative need. If this particular situation appears on April 29, the Cowboys must pull the trigger. At the end of the day, as much help as the defense needs, protecting their biggest investment in Dak Prescott should be their first priority.