Two of the most promising prospects in the Seattle Mariners farm system have been promoted to the Double-A Arkansas Travelers. Per a report from MLB.com’s Daniel Kramer, 20-year-old infielder Michael Arroyo and 20-year-old outfielder Lazaro Montes will move up from the High-A Everett AquaSox to the Double-A Arkansas Travelers. The news of Montes’ promotion was first broke by Francys Romero.