The Dallas Cowboys' defense was cited as the reason they fell short of the playoffs last season as a reason for their failure to perform well in the league. The team's defense ranked 30th in yards allowed per game and 32nd in points conceded per game. The Cowboys have since made significant changes to their defense in free agency, including trading for edge rusher Rashan Gary and signing safety Jalen Thomson and center Cobie Durant. They are also planning to move from a 4-3 structure to a 3-4 base under new defensive coordinator Christian Parker. The franchise may also consider drafting more defensive help in the 2026 draft.