You have had good insights from many posters here OP, Squareflair's post sums up much of what I would have added. Ask as many questions as you can from anyone with experience before committing, the pitching coaches can be very alluring from Y11 onwards.
Couple more from me:
- Athlete scholarships are very different to Athlete Recruits. The latter does not come with financial support, unless you apply and qualify for Financial Aid (not loan, do not have to pay back), These will be awarded on a needs blind (most Ivies, Stanford, MIT, Amherst, Boston, Caltech, Carneigie Mellon, but not all), or needs aware by other private unis. No/limited FA to international students from State colleges.
- Balancing the students needs of academic vs sport. As posters have said, if you already know what your DS wants to major in, he will still have to complete many of the liberal arts/rounded courses to gain credits unless exempt. Fine if he's happy to experience a more rounded education.
- Be mindful that your 18 year old DS may feel different about his sport during the 4 years. So any strings attached, such as conditions linked to the sport can be affected by injury, loss of form, benched, as well as having to maintain academic requirements.
- Ignoring the current political landscape is just fool hardy. Many sports heavy unis/colleges will be in politically charged states. Once out of the higher profile ones chosen by international students for their international standing will have cohorts mainly from instate (due to fees) and can be divisive. As excellent as they are, they will have a vibe, indigenous to that state.
- Same with frat vibe of college, check how strong it is, and whether it suits your DS.
- Working - International students can usually only obtain work on campus
- F-1 visa grace period post graduating, can be as little as 60 days.
In summary, I believe a US UG education, especially with a sports scholarship could be a wonderful experience. I have known many current/past students from my DD's sport, most have excelled and had a great time. Most have benefited from wealthy parental backgrounds so have not had to apply for FA, with DC successful in Ivy applications and Lib Art colleges such as Pomona. Not NCAA league, apart from one student representing her country (missed Olympics selection but competed at World/Commonwealth)
Of the others who are not financially able to absorb costs, one is mid degree with UofChicago on a full ride package and thriving in her sport.
Others benefitting from full scholarships at UofTampa, Santa Clara, UofTexas to name a few. But only after a gap year to generate enough funds to support their full needs (like accom off campus after year 1)
I have extensive family in US (all advising don't come now, it's a dark place to be), and whilst DD had considered it 3 years ago and completed all SAT testing, essays and other requirements via College Board, she pulled out due to the change in political climate, covid handling and finally understanding more the cost benefit of UG vs unis in Europe, we were very transparent about cost of all options and alternatives, such as going overseas for PG instead.
Good luck, sorry for long post and do use Fulbright also for more information, if not already doing so.