Bsblmomma,
You've been given some great advice about the who, what and when. My concern is more about the how. How has your son been reaching out to these coaches/schools to discuss his interest and goals? Has he been aggressive with his communication toward these targeted schools? Cabbagedad touched on this and I suspect this is what is missing along with someone who will advocate for your son. Your son has the metrics and exposure. It may be a matter of following up with these college coaches by picking up the phone and sending a follow up email. I'd encourage you and your son have a discussion with his travel coach so you can discuss goals and coordinate efforts.
JMO.