TR is right, and don't sacrifice your son's well being because the coach doesn't have enough senior pitching. It is ok if the pitch count stays low, but that is not always a given.
Tonight was our first game that "counts",not a district game. Due to rotation, my son started and 6 innings 95 (we think more) pitches later he finished the game. Completely unneccessary and my husband and I are upset he threw so many pitches first game of the season. They said he was not struggling, averaged 15 pitches per inning and still throwing 90 near the end. They asked him if he wanted to come out. In the fifth my son hit a homerun, had one hit off him all night, it was his night, do they think he would have said yes? Although the coach refused to listen to us after the game, I think he got the message. My son is horrified at us for speaking up, too bad. My son could have a future in pro ball, it is his future,coach just wanted the win tonight.