The Mariners made a handful of moves at the deadline, so how does the financial picture look now?
The Seattle Mariners made two major moves at the Major League Baseball trade deadline, acquiring Seranthony Dominguez and prospects from the Chicago White Sox for Luis Castillo and acquiring Taylor Ward from the Baltimore Orioles for Alex Hoppe and two prospects.
As is usually the case, Mariners fans are wondering about the role that the finances played in these moves - and how the finances are shaping up moving forward.
So, let's take a look at everything:
Luis Castillo ($7.8 million remaining in 2026)
The White Sox are paying Castillo's full remaining salary, which is just under $8 million. So, the Mariners shed that almost $8 million for the rest of the year.
Seattle Mariners starter Luis Castillo (58) delivers a pitch during the first inning against the Toronto Blue Jays at T-Mobile Park. Stephen Brashear-Imagn ImagesSeranthony Dominguez ($2.1 million remaining in 2026)
In getting Dominguez, the Mariners picked up the full balance of his remaining deal, reducing their Castillo savings to $5.7 million in total.
Nolan Jones ($598,000 remaining)
The Mariners took the full freight of Jones's salary as well, reducing their Castillo savings to about $5.1 million in total.
Taylor Ward ($3.5 million remaining)
In getting Ward from the Orioles, the M's are picking up the full tab here as well, reducing the Castillo savings to about $1.6 million.
Other note
Because Dominguez has a $2 million buyout on his deal after the 2027 season, the Mariners are basically guaranteed to take on $2 million in salary down the line. So, effectively, this deals caused the Mariners to take on about $400,000 in salary before you include the minor league prospects. ($1.6 million saved + $2 million more spent + $400,000).
While I can't directly calculate the salaries of the prospects, Seattle shipped out Alex Hoppe and two minor leaguers to Baltimore while only bring back Boston Smith from Chicago, so there's a good chance that the three salaries given away plus the one taken in end up making this deal very close to a net even deadline from a financial standpoint.
It would be unfair to say that the Mariners saved significant money in 2026 by trading Luis Castillo. Instead, they simply re-allocated his money to other areas of the roster that were in need.
It would also be unfair to say that the Mariners took on significant money in 2026, because it's clear that they did not. Could they have taken on more money to help this team in other meaningful ways? They could have. They chose not to, or they were unable to find a deal that benefited them enough to make it worth it.
Baltimore Orioles designated hitter Taylor Ward (3) stands in the on deck circle during the first inning against the Seattle Mariners at Oriole Park at Camden Yards. James A. Pittman-Imagn ImagesThe real kicker
Castillo is due about $25 million in 2027 while Dominguez is due $10.5 million. By shedding Castillo's salary, the Mariners are saving about $14.5 million in 2027.
Of course, the labor situation will impact everything that happens in the offseason, but between the $14.5 million saved here, plus the money saved from Randy Arozarena, JP Crawford, Rob Refsnyder and Mitch Garver coming off the books, there should be some money to play with over the winter.
Of course, Josh Naylor, Cal Raleigh and Julio Rodriguez all continue to make big/more money from contract extensions, and guys like George Kirby, Bryan Woo, Logan Gilbert and others will make more through arbitration, eating into that savings significantly.
Of note
The newest edition of the 'Refuse to Lose Territory' podcast is out, breaking down the Mariners trade deadline. You can listen here, or you can watch in the YouTube player below:
