The Dallas Cowboys are entering a critical season with new head coach Mike McCarthy and quarterback Dak Prescott under contract extensions. Despite having one of the highest win percentages in the NFL, McCarthy's team has yet to achieve postseason success. In order to secure his position as head coach for years to come, McCarthy needs to prove himself against the AFC during the playoffs. With a 1-0 record in February, he is off to a good start and will need to build on that to keep his job in Dallas.