Seth or someone can correct me if I am wrong. But isn't it typical if they DFA someone they don't announce that until he has either been selected by another team, traded to another team, or cleared waivers and reports to St. Paul?
If that is the case, expect someone is going thru the DFA process and we will learn what happened in a few days. My guess who would be Whitefield, but could be someone else or even someone moved to the longer injury list (is it still 60-days, or 45 this year?).
What you describe is outright assignment waivers. They could put a player on the current 25-man or 40-man roster on waivers behind the scenes, and then only announce it if he is claimed by another team, or if he clears and they outright him off the roster. (Even if he clears, they don’t have to outright him right away either, so there might be no announcement.)
DFA is a little different. That actually removes the player from the roster immediately, so it can’t be done behind the scenes. Then you have up to 7 days to trade, waive, or release the player.