One of the problems Dallas had last season was stopping the run especially against good teams San Fran The AFC teams. Re signing Armstrong gives you much need depth . Lawrence and Gregory both had injury issues which didn't help matters. The penalties that's on McCarthy because he isn't holding his players accountable. Jimmy Johnson had no hesitation to get in a players face when they committed stupid penalities. Cowboys desperately need help on the offensive line. That reared its ugly head a lot even against weaker teams and the teams with winning records .