Dallas is employing an oddball setup, whereby Marinelli still has the title of DC. Despite that, Marinelli has turned over the defensive play calling over to Kris Richard. That includes the entire defense on game day and Marinelli says he's fine with that. Supposedly, Marinelli has control of the defensive line during the week in practice, even though Kris Richard calls the defensive play calls for the entire defense. A bit confusing, isn't it? I think so, too! Richard's official title at present is "passing game coordinator."
Anyhow, Rod has turned over the play calling to Kris Richard by way of his agreement to do so. To me, it's obvious that Richard is being phased in as the DC, even though Marinelli gets to retain the title until such time as he retires. It's truly an oddball setup that allows Richard to gradually assume the duties of a true DC, while Marinelli sits in the background as the coordinator of the DL during the week in practice. As odd as this may sound, that's what's happening currently in Frisco. Call it on-the-job training for Kris Richard to take full control, if it suits you. Granted, it's a bit "different."