Sunday’s season finale at T-Mobile Park has the look of a formality on the schedule, but for Logan Gilbert it could mean a lot more than the last game of a Mariners season that never really took off.
Gilbert is set to start against the Los Angeles Angels, and there’s a real possibility it will be the final time he takes the mound in a Mariners uniform. Nothing has been reported as done.
No trade has been announced. Still, the speculation around him has become impossible to ignore.
He comes into the game at 12-11 with a 3.81 ERA and 197 strikeouts, leaving him three punchouts shy of 200. It’s also the kind of line that keeps Gilbert right in the middle of the conversation about Seattle’s next move.
He is in the fourth and final year of arbitration and can become a free agent after the 2027 season. The Mariners explored an extension with him last spring, but nothing public ever came of it.
That leaves the club at a familiar crossroads: extend him, trade him, or let the situation drift.
The case for keeping him is obvious. Gilbert is the exact kind of pitcher the Mariners say they want to build around.
They drafted him, developed him, and watched him turn into a frontline starter. He has spent his entire major league career in Seattle and is now the longest-tenured starter in the rotation.
If “draft, develop and retain” is the plan, this is the cleanest test of it.
That doesn’t mean 2026 has been a perfect year for him. Gilbert knows it hasn’t matched expectations, and a 3.81 ERA reflects that. After his most recent start, he was direct about the job description: every big leaguer works, but the point is whether that work turns into wins.
Even so, the strikeout total still jumps off the page. He’s at 197, he’s still taking the ball every fifth day, and he’s still missing bats at a high level.
Seattle has already done the hard part by finding a pitcher of this caliber. Creating a new hole just because it might be cheaper to do so later would be a costly mistake.
The Mariners also have Kade Anderson and Ryan Sloan in the pipeline, and both are described as outstanding prospects. Their presence should not make Gilbert expendable. If anything, they should have a chance to join him in a strong rotation.
The timing matters, too. Gilbert is one year from free agency after the 2027 season, and Seattle can’t let the situation sit until his value drops and the move becomes unavoidable.
An extension would be expensive. He’s no longer a young pitcher being asked to trade away distant arbitration years for early security.
The Mariners had their window to negotiate, and now that window is shut.
If they can’t reach a deal, a winter trade becomes the painful but workable path. Seattle would still have a full season of control, which gives them more leverage than waiting until next July. It would also give another team time to work on an extension of its own.
If the Mariners do move him, though, the return has to be meaningful. A prospect package won’t cut it.
Seattle already has plenty of prospects. What it would need is an established, controllable impact hitter who could help the 2027 lineup right away.
Anything less would fall short.
So Sunday should not be treated like some sentimental goodbye already wrapped in a bow. Gilbert could still sign an extension this winter and stay in Seattle.
He could return on his current contract and remain a Mariner through 2027. Those are still live outcomes, and if he stays, that’s the result Seattle should want.
But if he gets to 200 strikeouts and Dan Wilson comes out for the final time, the moment will carry extra weight. A cap tip on the way to the dugout would be worth noticing. It might not be the last start he ever makes at T-Mobile Park, but it also might be.
The Mariners really only have three paths here: extend him, trade him for a major league hitter that justifies the price, or keep negotiating while committing to contend. If Sunday ends up being Gilbert’s last start as a Mariner, it won’t be because Seattle stopped needing him. It will be because the club decided it couldn’t, or wouldn’t, keep him.
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