I currently have 3 Centers that I am training. I played one in my game yesterday. I set him up as the starter, the back up and the bench player for the C position. I told the coach to "let them play" if they get in foul troubles and "strictly follow depth chart" but my Center still only played the first 36 minutes. At the start of the 4th quarter he was substituted out, and did not step back onto the court. Anyone know why?