To hold the attention of the reserves during all of those practices so that when their number is called, they're prepared to go. Every guy on the team is on message, regardless of where they are on the depth chart. That's the sign of a good coach.Has Iowa ever had this much depth on defense without a notable drop off. 3rd stringers stepping up at LB. At least 2nd stringers at corner. Phil is definitely the glue holding the ship together.