The Detroit Lions are staring at a familiar NFL accounting twist, and it could leave them over the salary cap by Monday.
That’s the wrinkle that comes when the league moves from the offseason to the regular season. In the offseason, with a 90-man roster, only the top 51 contracts count toward the cap.
Once teams get down to 53 players, though, every contract starts counting. That means the active roster, the practice squad, players on injured reserve or PUP/NFI, and all dead money from terminated deals are suddenly part of the equation.
Under the offseason “top-51” setup, the Lions were sitting at just over $10 million in cap space, according to the latest NFLPA public salary cap report. But when the NFL switches to regular-season accounting on Monday, Over The Cap projects Detroit to be about $3 million over.
Jason Fitzgerald, who runs Over the Cap, has already flipped his site over to the regular-season rules, though he says he is “about a day behind on waivers.” Even with that caveat, his 2026 salary cap breakdown points to the Lions needing to do some work before Week 1 fully settles in.
The blunt answer to how Detroit can be over the cap is simple: it can’t stay that way.
By Monday, the Lions will have to get compliant. That could mean trimming a player or two and opening up room - they may have already started that process by releasing Seth McLaughlin and Jabari Small. More likely, though, the move will come through contract restructures that not only get them under the line but also create enough breathing room for the season ahead.
That matters because in-season cap space is never just about the current roster. If a player goes on injured reserve, he still gets paid in full, and Detroit has to cover the replacement on the 53-man roster. The Lions would also want flexibility for the trade deadline and for any other player who becomes available later in the year.
There is one big piece that complicates the math: Fitzgerald’s projection includes $6.66 million in dead cap from Terrion Arnold’s contract. That figure reflects the dead cap hit if the Lions do not try to void his guarantees. Publicly, there is no information yet on whether Detroit is pursuing that route, but based on the team’s history of conduct, there’s a pretty good chance they are.
And if Arnold pushes back, that could turn into a grievance. In that case, the Lions would be charged 40% of the contested salary against the cap until the matter is resolved. After the ruling, Detroit would either get cap space back or have to absorb more cap commitments depending on the outcome.
Even with that uncertainty, the Lions are still likely to make room. As a rule, they like to keep between $10-20 million in cap space during the season, and even if Arnold’s money comes off the books, that probably still would not be enough for Brad Holmes and company to feel comfortable.
The cleanest path is a restructure, and Detroit already took a partial one with Jared Goff this offseason. There is still about $14 million of Goff’s salary that can be converted into a signing bonus, which would free up almost $12 million by itself.
Penei Sewell’s $19.9 million salary is also an obvious candidate, and Amon-Ra St. Brown’s $27.5 million salary is in the same conversation.
So the Lions have plenty of ways to get under the cap. The real question is how they choose to do it, and how much of the bill they decide to push into the future.
That’s the larger takeaway here: Detroit can manufacture space when it needs to, but every move like that comes with a cost down the road.
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