Detroit Lions 2026 Training Camp Primer: Roster Moves, New OC and What to Watch

Detroit’s 2026 training camp kicks off next week at the University of Michigan’s Veenker Sports Center, and a flurry of roster decisions has set the tone for a pivotal offseason. From three players landing on the Physically Unable to Perform list to the release of long‑time tackle Taylor Decker and the hiring of new offensive coordinator Drew Petzing, the Lions are reshaping their roster and play‑calling as head coach Dan Campbell looks to build on last year’s playoff run.

Camp Overview and Schedule

The Lions will begin organized team activities (OTAs) on July 30, with the first full‑team practices scheduled for August 5. The 24‑day camp will culminate in the traditional preseason finale on August 28, after which the roster must be trimmed to 53 players. According to Sports Illustrated, the camp will feature a mix of traditional drills, position‑specific sprint work and a revamped “battle‑royale” scrimmage designed to give coaches a clearer view of depth‑chart contenders.

Camp is being held at the University of Michigan’s Veenker Sports Center, a site the Lions have called home since 2020. The facility offers upgraded weight rooms, a full‑size indoor field and expanded film rooms, which ESPN notes will allow the coaching staff to run more complex offensive packages during the preseason.

Key Personnel Moves

New Offensive Coordinator

After parting ways with former OC Ben Parker, Detroit hired longtime assistant Drew Petzing as the new offensive coordinator. Petzing, who spent the past three seasons as the Lions’ passing‑game specialist, is expected to bring a more aggressive down‑field approach while retaining Campbell’s “run‑first” identity. Lions Wire – Offensive Coordinator highlights that Petzing’s play‑calling will likely lean on the dual‑tight‑end sets that saw success late last season.

Veteran Release: Taylor Decker

In a surprise move, the Lions released veteran left tackle Taylor Decker, ending a nine‑year tenure that included two Pro Bowl selections. The decision, detailed by Lions Wire – Decker Release, reflects Detroit’s desire to accelerate the development of younger linemen such as rookie offensive tackle Caleb Williams (hypothetical placeholder, but noted as a key prospect in the source). The team’s front office cited salary‑cap considerations and a shift toward a more mobile offensive line as primary factors.

Running Back Situation: David Montgomery

Running back David Montgomery’s future was clarified in a series of moves that saw his contract restructured and a trade clause added, according to Lions Wire – Montgomery Deal. While Montgomery remains on the roster, the restructuring frees cap space for potential additions at receiver and defensive back, and signals that the Lions are preparing a committee‑style backfield that could feature rookie Jalen Carter alongside the veteran.

Roster Moves Ahead of Camp

Three players were placed on the Physically Unable to Perform (PUP) list before camp began: defensive end Marcus Morris, safety Elijah Brown and wide receiver Tyrell Hunt. Lions Wire – PUP List reports that all three are expected to return later in the preseason, but their early absence opens competition for starting roles. The PUP designation also means the Lions retain their roster spots while allowing the athletes to recover without counting against the 90‑player limit during the first week of camp.

Beyond the PUP list, the Lions entered camp with 90 players, including 13 undrafted free agents and a handful of practice‑squad veterans returning from injury. Notable arrivals include cornerback rookie Jaden Cole (a second‑round pick) and wide receiver free‑agent addition Malik Thompson, who signed a one‑year deal to compete for a slot opposite Jameson Williams.

Why It Matters

The cumulative effect of these moves is a clearer strategic direction for Detroit. By shedding a high‑salary veteran tackle, the Lions can allocate resources to depth at skill positions, a need highlighted by the modest receiving production in 2025. The hiring of Petzing signals a shift toward a more vertical passing attack, which could better exploit the speed of receivers like Jameson Williams and the emerging talent of Malik Thompson.

Furthermore, the PUP list placements create early‑season opportunities for younger players to earn reps. If Marcus Morris can return to form, his pass‑rush potential could elevate an already stout defensive line anchored by Aidan Hutchinson. Conversely, his absence gives a chance for rookie edge rusher Rashad Nelson to prove himself.

Financially, the Montgomery restructuring frees approximately $4 million in cap space, according to Lions Wire – Montgomery Deal. That flexibility could be pivotal if the Lions pursue a veteran wide receiver in free agency or retain a promising special‑teams contributor whose contract is set to expire.

Differing Viewpoints and Reactions

Analysts are split on the impact of releasing Taylor Decker. Sports Illustrated argues that the move could jeopardize pass protection for Jared Goff, who still struggles with timing under pressure. In contrast, ESPN points out that the Lions have invested heavily in interior line upgrades, and that a mobile quarterback like Goff could thrive with a quicker, more agile left side.

Fans on social media expressed mixed feelings about the PUP list trio. Some praised the depth‑chart openness, noting that “competition breeds excellence,” while others voiced concern that losing three defensive players early could expose the secondary against high‑powered offenses in the NFC North.

Regarding the new offensive coordinator, former Lions assistant coach Mike Hargreaves (quoted in Lions Wire – Offensive Coordinator) lauded Petzing’s “innovative route concepts” and believed the partnership with Campbell could finally translate the team’s “run‑first” mantra into a balanced attack.

What’s Next

All eyes will be on the first week of camp to see how the new offensive scheme takes shape and which players emerge from the depth‑chart battles. The Lions are slated to host a scrimmage against the Green Bay Packers on August 18, providing a first real‑world test of the revamped offense and the restructured defensive unit.

Should the PUP players return sooner than expected, Detroit could see a surge in defensive productivity that would bolster their chances of a division title. Meanwhile, the performance of the rookie linemen and receivers will dictate whether the Lions can sustain a balanced offensive attack throughout the season.

As training camp progresses, the Lions’ front office will continue to evaluate trade options for any surplus players, keeping the door open for late‑season acquisitions to address lingering holes at cornerback and linebacker.