How Concering Are Commanders’ Latest Injury Updates?

Dan Quinn provided major injury updates for the Commanders, and two are of big importance: Johnny Newton will miss 'significant' time with a torn pec, and Nick Allegretti is not ready to do - meaning JD5, or whomever plays QB in Detroit, will have a backup snapping them the ball. How concerning are these two and all the injuries, espcially given the balance of playing starters in preseason?