Would you let your kid do this?

Absolutely not.

Sometimes the private school education isn't about the "education". It's often about the alumni network. Doesn't sound like in this case, though.

C's at a private college prep are often A's at a public school. My kids have been held to higher standard with regard to grades at their schools. With my 8 year old the grade cutoffs are 94-100 =A 87-93= B, 80-86= C. Personally I thinks it's BS with an 8 year old, but the school is affiliated with my wife's church. They have zero tolerance with regard to behavior. Personally, I think the teachers are a bunch of tight*** (self-edited) hypocrites and play favorites.

I wouldn't pay 100K for my kid to attend a private school that may or may not secure his/her placement in a top notch college. Whatever shortcomings our public education system has gets supplemented at home with mom/dad providing additional education where/as we see fit.

Since that ship has sailed in this particular case, it depends. Was the parent complicit in this Division I baseball gig as part of the package? I'm assuming junior is getting a free ride on the college gig as well (scholarships, grants, mom/dad)? If mom/dad are paying the boat, then you by all means have a say. If junior is paying the freight, let him go where he wants. Perhaps mom/dad's dream for junior's future isn't junior's dream?

Larry ... Dad is paying for college. If it was my kid I'd tell him try out for the club team at the D1 and hook up somewhere for summer ball.