The Red Sox were willing to part with Triston Casas for one of the Mariners' standout pitchers on one condition.

The Red Sox and Orioles were mentioned as possible landing destinations for Luis Castillo in a potential trade.

Boston is also connected to pitchers like Jack Flaherty, Corbin Burnes, Max Fried ... deal to move Castillo. Boston would be one team that could bite on that idea. Castillo Red Sox In this deal ...

The Reds trade for Luis Robert Jr.? The Braves sign Jack Flaherty? Jim Bowden suggests moves to fill key needs for six ...

Could the answer include swinging a deal with the Seattle Mariners for right-handed hurler Luis Castillo ... and Max Fried. But if Burnes and Fried take their talents elsewhere, the Red Sox ...

The Athletic’s Ken Rosenthal listed multiple arms he says the Red Sox are in on. The insider reaffirmed that the club has “inquired about” trading for the Seattle Mariners’ Luis Castillo ...

Two things are clear about the Red Sox ... Max Fried alongside him at the top of the staff," Pressnell said. "In this deal, the Mariners should be assumed to be paying about a third of ...

Seattle Mariners pitcher Luis Castillo is a hot commodity on the offseason trade market. Ken Rosenthal of The Athletic ...

The Red Sox landed ... from the White Sox for a four-prospect package, Boston is on the hunt for starting pitching. It’s unlikely that the Mariners would trade Castillo strictly for prospects.