Mariners Open to Trading Luis Castillo Amid Roster Moves

The Seattle Mariners are reportedly open to offers for veteran right-hander Luis Castillo, according to the Boston Globe. Castillo, who is set to turn 32 soon, is owed just under $70 million from 2025-27 with a vesting option for 2028. In 2024, he threw 175 1/3 innings with 175 strikeouts and a 3.64 ERA. With a loaded rotation, Seattle could deal a starter to bolster their offense. Trading Castillo, the team's highest-paid pitcher, would clear up some money and potentially add a bat or two.


The Boston Red Sox emerge as a potential landing spot for Castillo. After missing out on Juan Soto, Boston has a clear desire to add a high-end starter this offseason. They've been connected to Corbin Burnes and Max Fried recently, and they have depth in lefty bats like Wilyer Abreu, Triston Casas, Jarren Duran, Rafael Devers, and Masataka Yoshida. Could a trade involving Casas for Castillo, plus additional pieces to balance the deal, work for both teams?