From the minor-league system:-- Look for outfielder Julio Pablo Martinez, the Cuban free-agent addition, to be promoted from the Dominican Summer League soon. In six games, Martinez is hitting .474 with a 1.445 OPS in 27 plate appearances. His next stop likely is Spokane in the short-season Class A Northwest League, which opens on Friday.-- Right-hander Ronald Herrera is headed toward season-ending surgery to repair a flexor tendon in the right elbow.Herrera has not appeared in a game this season.