Mariners could get another crack at trading for Red Sox slugger on shaky ground

Seattle Mariners v Boston Red Sox | Maddie Meyer/GettyImagesThe Seattle Mariners aren't being cute about how they want to fill their hole at first base. Josh Naylor was the guy they had at the end of 2025, and Josh Naylor is the guy they want to be there in 2026 and beyond. It's not rocket surgery.

And yet, it doesn't take much to imagine dominoes falling in such a way that the Mariners are forced to take another look at Boston Red Sox slugger Triston Casas.

The Mariners had to seriously consider Casas last winter, precisely because the Red Sox asked them to in trade talks centered on starting pitching. Boston wanted Bryce Miller or Bryan Woo for Casas, to which the Mariners pretty much said…