junior year

We can only guess to possible scenarios based on the little info provided...

I'm assuming, since you mentioned 39 inning rule, he is a P.  If he is a junior P and considered a draft candidate and has thrown 40+ innings, this doesn't seem that odd.  At this point, when weighing arm health vs getting more innings to refine, many would lean toward arm health.  

This said, if he felt he wanted to get some work in, I can tell you there are summer college clubs everywhere who are getting the word about now that the pitchers they had slated to come in are backing out for a variety of reasons... injury, fatigue, exceeded inning target, mental break, etc., etc.  So, he could easily find a home and dictate reasonable limitations on how much or little he would like to throw.  

Son is a coach in the Valley League in Va. and currently actively replacing P's.  I can connect you if helpful.  That said, of course, he would need to determine if his college coach was being adamant about not playing or just not placing him because he didn't feel he needed to play.

He is div 1 pitcher (draft 2018 eligible) and prob will have 39 inning+  the end of season is over. I believe coach has to approve his participation in summer ball. It just a little odd that he is not scheduled to play for summer. Maybe because coach knows more and doesn't want to tell him? 39 innings is not much for not be able to play during summer. Just looking for clues...

When you say :"just not placing him because he didn't feel he needed to play." Can you please help me to understand your thoughts? 

thank you for your reply

Sure.  It's nothing too deep.  He is a junior D1 P who throws for his program with some regularity.  His skill set is advanced.  He gets plenty of game innings.  He has thrown plenty against good competition.  The lack of any of those three things is largely the reason that coaches send players to participate in college summer ball.  The drawback is potential injury.  When a player is already accomplished, getting innings with his college program and not needing to work specifically on any changes, etc., the risk sometimes does not outweigh the reward.  If not drafted, there is plenty of time to ramp back up and get sharp again in the fall for a proven guy.

I get that you may be hinting it may have something to do with likely draft status that the HC may know about.  That could be... I have no idea.  Maybe others have had direct experience with that aspect.  It would seem to me that, first, a player would have an idea of where he is likely to be drafted and, second, that his college coach would share any info on that front but I could be mistaken.