Very few if any split contract players have never played in the majors or at least on the 40 man roster.
What does a contract as signed look like for a player like Oviedo ? Wouldn’t he most likely have a standard contract that pays him based on his level. If so, the question is what level are they using for the base pay while in Springfield? Or maybe they are treating it as Spring training (no compensation) and only paying per diem.