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

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

The Chicago Cubs could go after a starting pitcher on the trade market after missing out on some of the top free agents available.

The Seattle Mariners’ position on trading right-hander Luis Castillo is simple, according to sources briefed on their discussions: We’ll do it, but only if the return makes the team better. That’s a high bar when discussing a pitcher of Castillo’s caliber,