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

With the Red Sox casting a wide net to improve their roster this offseason, Triston Casas’ name has been a fixture in trade rumors. Most notably in connection with the Seattle Mariners, who have a need for offensive talent and an abundance of young starting pitching to offer.

The Boston Red Sox continue to target upgrades to their starting rotation as the 2024-2025 offseason goes on. One name that has surfaced repeatedly in the team’s quest is Seattle Mariners righty and three-time All Star Luis Castillo.