West Coast:
What position does your son play? I'm guessing MI or OF. Given his grades (A average), if you are looking at "high academic" schools, you are still early. Try to get on the radar with as many schools as possible; given your son's performance he probably has some additional interest. A number of coaches go for a string of recruiting events on a trip, often not one showcase. There is some time that they need to process what they've seen when they return to the office. They are probably reassessing their needs for 2019 class. Keep in contact with them on a regular basis if interest remains on academic or athletic news (recent transcript, showcase events, personal best running, lifting , SAT/ACT score, etc. Things will heat up next year, especially next summer. If your son received an offer, would he be ready to commit? You'll see more peaks and valleys..I know from experience.