Three-time All-Star starting pitcher Luis Castillo may be available for trade this offseason. But, the Dodgers are not considered top contenders for the Dominican pitcher.
The Seattle Mariners are in desperate need of infield pieces. To combat the lack of support in the infield, Seattle may consider trading pitchers in their rotation, which is arguably the best in the Major Leagues. The Mariners have five consistent starters, including four younger pitchers and eight-season veteran Castillo.
Castillo is considered to be the main pitcher the Mariners would consider trading. However, Seattle would likely require teams to offer an infielder and starter to fill the void left by Castillo.