articleThe Brief The Mariners traded right-handed pitcher Luis Castillo to the Chicago White Sox in exchange for right-handed reliever Seranthony Domínguez, outfielder Nolan Jones, and catching prospect Boston Smith. The Seattle Mariners have swung their first trade of deadline season. The Seattle Mariners traded right-handed pitcher Luis Castillo to the Chicago White Sox in exchange for right-handed reliever Seranthony Domínguez, outfielder Nolan Jones, and catching prospect Boston Smith. A key trade deadline acquisition by the Mariners in 2022, Castillo has been a standout during his five seasons in Seattle. The Source: Information in this story came from ESPN.com, the Seattle Mariners and FOX 13 Seattle reporting.