Inside the Cowboys Projected Week 1 Starting Defense Lineup as of Today

The Dallas Cowboys’ defense has been one of the most consistent and formidable units in the NFL over the past few years. Under the guidance of defensive coordinator Dan Quinn, the team has successfully developed a defense that not only excels in stopping the run but also applies relentless pressure on opposing quarterbacks. As the 2025 NFL season approaches, the Cowboys’ defense is going through some significant changes. Some new faces will be joining, while key players are stepping into larger roles. With the season opener right around the corner, here’s a deep dive into the projected Week 1 starting defense lineup for the Dallas Cowboys as of today.

Defensive Line

The defensive line is arguably the most critical part of the Cowboys’ defense. This unit not only sets the tone for how the rest of the defense operates but also dictates the level of pressure on opposing quarterbacks. The Cowboys have made some key moves to improve this group and address their needs. Let’s break down the projected starters along the defensive line.

Left Defensive End (LDE): Sam Williams

Sam Williams, entering his second year in the NFL, is projected to start at left defensive end for the Cowboys. Williams showed plenty of promise during his rookie year, recording four sacks and showcasing a quick first step that allowed him to penetrate the backfield effectively. His strength lies in his ability to rush the passer, but Williams also has the versatility to play multiple positions along the defensive line.

The Cowboys will be looking for Williams to take the next step in his development and become a consistent disruptor on the edge. His ability to bend around the edge and pressure the quarterback will be a critical factor for the Cowboys’ defense. With DeMarcus Lawrence no longer in the mix, this is Williams’ chance to prove that he can be the dominant force the team needs opposite the veteran defensive tackle.

Defensive Tackle (DT): Osa Odighizuwa

Osa Odighizuwa will start at defensive tackle in the Cowboys’ projected Week 1 lineup. Odighizuwa has been one of the more underrated players on the team, but his contributions have not gone unnoticed. Over the past two seasons, Odighizuwa has developed into a reliable interior lineman who can disrupt the pocket and stop the run. His quickness and ability to get off the ball make him a constant threat to opposing quarterbacks, as he excels in interior pass-rushing situations.

Odighizuwa has proven to be a valuable asset on the defensive line, and with more focus on his development this offseason, he is expected to take on an even more prominent role. His ability to both collapse the pocket and stop the run is what will make him an essential piece of the Cowboys’ defensive front.

Nose Tackle (NT): Mazi Smith

The nose tackle position is one of the most crucial in a 4-3 defense, as the player in this position is expected to eat up blockers and clog running lanes. The Cowboys’ decision to start Mazi Smith at nose tackle reflects their desire to bolster their run defense. Smith, a rookie out of Michigan, is a massive force on the inside. His size and strength are his biggest assets, as he is capable of holding his ground against double teams and freeing up linebackers to make plays.

The Cowboys’ defense has often struggled in stopping the run in the past, and Smith’s ability to command attention from offensive linemen will help free up the team’s more athletic players on the edge. His impact might not always show up on the stat sheet, but Smith’s role will be essential for the Cowboys’ defensive line to be successful in 2025.

Right Defensive End (RDE): Micah Parsons

Micah Parsons is perhaps the most dynamic player on the Cowboys’ defense, and in 2025, he is expected to be used in even more versatile ways. Although Parsons is predominantly known as a linebacker, his ability to rush the passer from the edge has earned him a spot on the defensive line for Week 1. Parsons has the ability to dominate both inside and outside, making him one of the most feared defenders in the NFL.

The decision to use Parsons on the defensive line full-time, particularly at right defensive end, is a strategic one. His speed, strength, and motor make him an ideal candidate to apply constant pressure on opposing quarterbacks. Parsons has the ability to create mismatches wherever he lines up, and with him on the edge, the Cowboys will have a player who can consistently disrupt offensive game plans.

Linebackers

The Cowboys’ linebacker corps is one of the more athletic groups in the NFL, and with some key additions, it could be even more impactful this season. The linebackers play a key role in both run defense and pass coverage, and the team’s success in these areas will largely depend on how well this group performs.

Weakside Linebacker (WLB): DeMarvion Overshown

DeMarvion Overshown, a second-year player, is expected to start at weakside linebacker for the Cowboys. Overshown is a former safety, so his ability to cover in space and his athleticism give him a unique skill set that most linebackers don’t possess. His versatility is a huge asset, as he can drop into coverage against tight ends or running backs while still providing solid run defense.

In 2025, the Cowboys are expected to rely on Overshown’s speed and playmaking ability to cover the more dynamic players in opposing offenses. His development over the past year has been noticeable, and he should be able to step into a starting role with confidence. His ability to read the offense and make plays in the open field will be pivotal for the Cowboys’ defense to thrive.

Middle Linebacker (MLB): Kenneth Murray Jr.

Kenneth Murray Jr. is the Cowboys’ most recent addition to their linebacker group, joining the team via trade with the Los Angeles Chargers. Murray, who has been a consistent tackler for the Chargers, will step into the starting middle linebacker position. His ability to read offenses and cover ground quickly will be essential for the Cowboys’ defense, especially when it comes to defending against running backs and tight ends in the passing game.

Murray has been known for his tackling ability and high motor, and his leadership on the field will provide the Cowboys with a much-needed boost in the middle of the defense. His familiarity with the team’s defensive scheme and his experience in big games will make him a critical part of the Cowboys’ linebacker corps.

Strongside Linebacker (SLB): Jack Sanborn

Jack Sanborn is projected to start as the strongside linebacker in the Cowboys’ defense. Sanborn, who played for the Chicago Bears previously, provides the Cowboys with a physical presence in the run game. He has the ability to take on blockers, shed them, and make plays near the line of scrimmage. Sanborn’s toughness and leadership will be invaluable, especially when facing off against heavy run-oriented offenses.

The Cowboys will lean on Sanborn to be the enforcer in their linebacker group, setting the tone in both run defense and as a capable tackler. Sanborn’s familiarity with Dan Quinn’s system from their time together in Chicago also gives him a leg up in seamlessly fitting into the defense.

Secondary

The Cowboys’ secondary has long been a strength of their defense, with top-tier cornerbacks and ball-hawking safeties. Heading into 2025, the Cowboys are looking to build upon this foundation and further solidify the back end of their defense.

Left Cornerback (LCB): Trevon Diggs

Trevon Diggs has become one of the league’s top cornerbacks, known for his ability to track the ball and create turnovers. Diggs is expected to remain at left cornerback, where he has thrived throughout his career. His aggressive style of play and his knack for interceptions make him a dangerous weapon for the Cowboys. Diggs is expected to shadow the top receiving threats in 2025, and his ability to take the ball away from quarterbacks will be essential for the Cowboys’ defensive success.

Right Cornerback (RCB): Caelen Carson

Caelen Carson, who has shown growth over his first few seasons, is expected to start at right cornerback for the Cowboys. Carson is a solid corner who can play physical at the line of scrimmage while also keeping up with receivers in coverage. With his length and ability to make plays on the ball, Carson’s development will be key to the Cowboys’ overall secondary success in 2025.

Nickelback (NB): DaRon Bland

DaRon Bland will assume the role of nickelback in the Cowboys’ defense. Bland has proven to be an effective slot corner and will be tasked with defending against quicker, more elusive receivers. His versatility and ability to adapt to different matchups will allow the Cowboys to deploy multiple coverages and defensive looks, providing more flexibility in their schemes.

Free Safety (FS): Donovan Wilson

Donovan Wilson is projected to start at free safety for the Cowboys in 2025. Wilson has been a steady contributor to the Cowboys’ defense, with his ability to play both in the box and deep as a center fielder. Wilson’s versatility and physical style of play allow him to cover a lot of ground and make plays on the ball.

Strong Safety (SS): Malik Hooker

Malik Hooker rounds out the secondary as the strong safety. Hooker’s ability to read the quarterback and his ball skills make him one of the top safeties in the NFL. He will be tasked with providing support in both the passing and run games, making him a valuable asset for the Cowboys in 2025.

The Dallas Cowboys’ defense in 2025 looks primed to be a dominant force, with a mix of veteran leadership and youthful energy. With key players like Micah Parsons, Trevon Diggs, and Sam Williams leading the way, the Cowboys are expected to maintain their defensive prowess and be one of the toughest units in the NFL. As the season approaches, the team will need these players to continue to develop and work together to create a defense that can stop any offense in its tracks.