Is there a crossover from his main sport—like this other coach contacting him is an assistant for his primary one so sees potential? Maybe it’s a sport with a specialized position they see as an easy crossover? Regardless, if it’s one of his top choices and a good fit for his primary sport it could help him with admissions and could be a fun experience if he doesn’t already play a sport he enjoys that season. There’s always a chance there was a miscommunication but having him follow up could help him regardless since it would show initiative and maturity in knowing the right thing to do is respond, since as we know not adults even have this skill. 