Tommy Dunn aims to earn a spot in the Cowboys’ 2026 defensive tackle rotation

The Dallas Cowboys’ path to their 2026 defensive identity will run through the defensive tackle room, and at least one offseason candidate, undrafted free agent Tommy Dunn, is attempting to prove that his name belongs in the conversation. In a 2026 roster preview, Yahoo Sports framed Dunn as a player trying to “defy expectations” after early projections began to set a ceiling for what a fresh face might be able to secure on the 53-man roster.

That matters because defensive line depth is often where teams reveal their plans. Even if the public focus lands on stars and high-profile starters, the tackle rotation typically decides how often a team can sustain pressures late in games, keep gaps protected against power runs, and maintain consistency against quick game-to-game matchup changes. In Dallas’s case, the preview noted that the team’s defensive line is expected to look significantly different in 2026, which creates a narrower window for young players to separate themselves in training camp-style evaluation.

Dunn’s opportunity is rooted in the structure of NFL roster projection. When a team anticipates turnover, projections can quietly harden into a few presumed incumbents and a handful of “development” bets. The Cowboys’ preview suggested Dunn is gambling on the space between those categories, hoping to find “a crack” in the current outlook rather than only earning time as a back-end option. In practical terms, that means the Cowboys coaching staff would need to see Dunn clear tangible benchmarks, particularly in pass-rush practicality, leverage control, and the ability to hold up in run defense assignments.

The preview also underlined the broader theme that undrafted players often have to stack performances rather than rely on pedigree. Dunn’s role, as described in the roster rundown, is not about being slotted as a clear-cut starter, but about forcing the team to reconsider what “keeping around for further development” looks like once camp performance and preseason reps get folded into final roster decisions.

Still, the projection exercise is not the same thing as a finalized depth chart. Without additional reporting from Dallas’s official roster movements, or corroborating confirmation about Dunn’s contractual status and training-camp usage, it is safest to view this as a competitive outlook rather than a locked-in guarantee of a roster spot. The Cowboys’ offseason evaluation cycle could easily reorder priorities depending on how other interior linemen perform in camp and how the defensive staff balances immediate needs against longer-term development.

What to watch next for Dunn is straightforward. If the Cowboys’ defensive line truly changes in 2026, the interior will be one of the first places where new roles emerge. Dunn’s case will likely be determined by whether he can translate his toolkit into repeatable snaps against level-appropriate opponents, and whether the Cowboys decide his path should be accelerated into a roster role rather than a practice-squad-only developmental lane.