Several big name starting pitchers have already been on the move this offseason, and according to several rumors, the Seattle Mariners have been open to potentially trading their ace starting pitcher Luis Castillo.

Soon after starting pitcher Max Fried signed with the New York Yankees on an eight-year, $218 million deal, there were rumors that the Mariners and Boston Red Sox were engaged in trade talks involving Seattle starter Luis Castillo and Boston first baseman ...

Interest in Castillo increased significantly after the New York Yankees signed free-agent lefty Max Fried to an eight-year, $218 million contract, a Mariners source said. Castillo, 32, is owed less than one third that amount — $68.25 million over the next three years.

The Mariners have an opportunity to use some of their excellent starting pitching depth to improve the offense but the team has doubts.