The Mariners can see the fit with the Mets. The problem is getting from the idea to the actual trade.
Seattle wants two things: a right-handed bat and another reliever who can handle high-leverage innings. New York, meanwhile, has started its sell-off, and Luke Weaver stands out as one of the more appealing bullpen arms on the market. He’s worked late in games before, he comes with another season of club control, and he has a 2.03 ERA in 40 innings this season.
That should make him a natural target. Instead, it may make him expensive.
According to SNY’s Chelsea Janes, the Mets have told teams they are open for business and are already taking calls. They reportedly want to get moving early instead of waiting until the final stretch before the Aug. 3 deadline. That kind of timing usually matters with relievers like Weaver, because controllable bullpen help tends to draw plenty of attention fast.
Seattle’s needs are clear enough. The Mariners have already zeroed in on a right-handed leverage arm and another right-handed bat. The issue is that almost every contender is hunting bullpen help, which can turn a straightforward pursuit into a bidding war.
That’s where the names start to matter.
Kade Anderson and Ryan Sloan should be off the table immediately. Seattle should not move either of its top young starting pitchers for a reliever, even one with control beyond this season. Both also have value as insurance if the Mariners need rotation help later or want a bridge option in the bullpen.
Lazaro Montes belongs in the same protected category. The Mariners have spent years developing the big left-handed slugger, and it’s fair to ask whether they really want to send him to New York for about a year and a half of Weaver. That would be a bold swing, and one plenty of Mariners fans would hate.
Montes is not untouchable in a vacuum. He still has work to do with his plate approach, and his swing decisions will go a long way toward deciding whether his raw power turns into real production against better pitching.
But there’s risk in moving him, and there’s risk in keeping him. There’s also the very real possibility that he goes on to hit 35 home runs for the Mets while Weaver gives Seattle 90 innings and walks after the 2027 season.
That is not the kind of deal the Mariners should be eager to make.
Michael Arroyo is where things get uncomfortable. Seattle has good reason to hesitate there, too.
He has kept climbing through the system, and his offensive upside matters for an organization that has spent years chasing impact bats. At the same time, he may be the first prospect who would make New York feel like it had landed a true centerpiece.
Once Anderson, Sloan, Montes and maybe Arroyo are removed, the next tier includes Jonny Farmelo, Felnin Celesten, Luke Stevenson, Nick Becker and Yorger Bautista. Those are all quality prospects with upside. But none of them offers the same mix of value and certainty as Seattle’s top group.
That leaves the Mariners in a tough spot. They can offer volume.
The Mets are likely to want quality. They have made it clear they want “sure things.”
Seattle’s closest versions of that are Anderson and Sloan, while Arroyo has adjusted quickly to Triple-A pitching. That’s how an obvious match can start to wobble.
A more complicated route might be the only one that works.
Luis Castillo has already come up as the starting pitcher Seattle would most prefer to move. His salary makes that tricky, and New York is selling rather than trying to patch up its season with an expensive veteran starter. The Mets would have little reason to take Castillo unless the larger deal also fit their long-term plans.
Still, there is a possible framework.
Seattle could absorb Weaver’s remaining contract without asking New York to cover any money. The Mariners could then send Castillo and a prospect such as Farmelo or Celesten, while the Mets add one or two younger, high-upside players from deeper in their system.
That would not be a simple salary dump. It would be a broader exchange: Seattle clears Castillo’s future money, gets the reliever it wants and takes on a few developmental bets.
New York would get a recognizable starter it could keep, flip later or use in its rotation, especially if it is also listening on Freddy Peralta. It would be messy, but messy may be the only way these two clubs find common ground.
The Mets are not likely to hand Weaver over. The Mariners should not part with one of their four most valuable prospects for him. Once those positions harden, expanding the deal may be the only way to keep the talks alive.
There is at least one reason this could move quickly. Neither front office likes dragging things out.
New York reportedly wants to start dealing sooner rather than later, and Jerry Dipoto has never needed the final deadline rush to make a move. When Seattle likes a deal, it has shown it is willing to act early.
So this may not turn into a long rumor cycle. If the Mariners and Mets can build a creative package, it could happen well before Aug.
- Both teams have reasons to help set the market instead of waiting for it.
If Weaver is still in New York when deadline week gets deep, that probably says enough. The Mets’ asking price likely stayed anchored to one of Seattle’s better prospects, and the Mariners decided a reliever was not worth giving up Anderson, Sloan, Montes or Arroyo.
Weaver makes sense for Seattle. The trade may not. Not yet.
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