Top Dallas Cowboys training camp storylines: How much better will their defense be?

The Dallas Cowboys enter training camp with high expectations as quarterback Dak Prescott begins his 11th season, despite the team winning only seven games in each of the past two seasons. Prescott has led four Cowboys teams to at least 12 regular-season wins but has never advanced beyond the divisional round of the playoffs. Key storylines include the performance of rookie defensive back Caleb Downs, the 11th overall pick, and whether the defense can improve enough to make a playoff run.