I could be wrong- but I don't think the OP is asking about changing the mechanics of his pitchers, rather, he is asking how to match what the PC is asking the girls to do during the week in terms of their own workouts- with his/her practices and game schedules, so as not to overwork them, and to make sure their game performance is ok. this is a very reasonable question. I think there is a couple of things to consider. First, are you going to give them pitching time at practice? If so, and you expect them to pitch there, let them know how much time they will have, but I would not dictate to them what they need to do or what their workout will be. I would also make sure that they have the game and the practice schedules to discuss with their PC. A third thing would be to speak with the PC's, ask about how much time the girls need to warm up to go in to the game (do they have a regular warm up they need to do) and if there are any problems you could look out for, help with etc, and finally, what are their strengths and weaknesses in terms of their pitches. That is about the extent of it. Mostly, you want to protect the girls (1) from "overthrowing"- as that would hurt them - and (2) setting them up to do poorly by putting them in a game without allowing them to progress through a normal warm-up.