I’m going to approach your question from a coach’s - wants and needs.
I realize that you’re trying to do the best for your son, and that’s a pretty straight forward proposition that every coach, responsible for recruiting, understands. Therefore, there are things that a recurring coach and even a scout will do, behind the scenes as a matter of experience and professional competency.
First off, everybody goes through some kind of soreness and arm/elbow/shoulder issue. Some of these issues are minor and others are not. So during your face to face interview, you might want to be aware of the relaxed environment, the casual banter back and forth, and the buddy-buddy nature of the person/persons that you and your son will be talking to. Since your shooting for a D3 organization, I wouldn’t expect much in the way of “who are you” kind of meeting. I would expect a personal encounter that “sells” the college more than anything. So enjoy the visit(s), tell you boy to smile a lot, be respectful with “yes coach/no coach” and show an eagerness to support that club. I’d focus on the history of the club, who they compete against and those outcomes. I’d ask a lot of questions like:
-what kind of pitching staff are you collecting this season and the nest two seasons?
-where do you see me fitting into that pitching staff?
-what kind of weight, game endurance and so forth do you want from me?
-where do you expect me to play summer ball?
-what meal plan should I purchase?
Why do I suggest these questions? Because, if you get any kind of … “|Aaahhhh… well …uhhmm…” kind of generalities, then you know the health history is not going to be any kind of deal breaker, in any sense of the word.
But, be aware of this … your son will be filling out a application, probably a lot of them. On those applications will be a question or two of his health history. Bank on it. Also will be a question or two … who is your family doctor… or primary physician? In addition, just be aware of this word… ANY. Also, your son will be required to participate in a physical and a performance evaluation prior to being accepted, as a general rule. So just be mindful of keeping secrets that might come back to haunt him and you later on.
There is one thing in your son’s favor - you were smart enough to take that soreness in your son’s arm, early, and take it serious enough to find out why. Your son was seen by a professional and therefore was under the guidance and care of a professional. Every single youngster playing baseball that pitches goes through this kind of soreness - rarely do they receive the attention like your son had. So, if the subject comes up, you have a ironclad way of addressing it.
I should note something that goes under the radar of a lot of parents and their son’s. Your son will be 18 or older when he visits a recruiter - yes? If so, and he starts to fill out a application and some questionnaires, just be advise that he’ll be at the age of majority, therefore, considered an adult to all the implications that follow that.