The Mariners cleared up a six-man traffic jam by trading Luis Castillo to the White Sox. Luis Castillo’s Influence Went Beyond His Mariners StatisticsThe baseball reasoning behind the trade isn’t hard to read. Logan Gilbert Is Now the Leader of the Mariners RotationGilbert has been around long enough to understand what comes next. Gilbert, Kirby, Woo, Miller and Hancock are the rotation now. But the Mariners are past calling this a talented young rotation and grading it on potential.