Arizona Cardinals head coach Bruce Arians is an old school football coach. With limited practice time, he doesn't like to lose any time. He does not have the team stretch together, as he expects players to come onto the practice field ready to go, having done their stretching themselves.
He runs hard, physical practices within the limits of the collective bargaining agreement.
During OTAs, he runs two practices on two different fields, giving more players more reps for the coaches to watch.
He is impatient about players getting hurt.
But he is willing to make changes, as is evident in some of what the team is doing in terms of monitoring players.