Unfortunately, this position was labeled differently depending on who you asked. Some places called a guy a DB, others would call that same guy a CB. Worse, some sites referred to a safety a DB, others referred to that same guy a S, and another site would call him a SS. Because of this lack of standardization, it seemed to make the most sense to just combine them all under one umbrella, though that certainly did spike the DB totals on the quantity graph. Wasn't too worried about it since the primary focus was QB and OT.