First of all, they usually draft players who they think will pass on college. So maybe his grades are not that good?? What are the chances of him maintaining the proper grade point average to keep his scholarship? After all, what is it all about? Do we get excited about school?? No, of course not... It's all about baseball, and this comes from a teacher. Why not find out if a kid has got what it takes and send him to play professional ball? If it doesn't work out, he can then go to the local state commuter university which is relatively cheap, get his four year degree, and go to work like the rest of the male population who only WISH they had the chance to play professionally.
There was a local boy who was drafted here, 6th round, Bosox, RHP. He got good bonus $$$, $600K. He bounced around the minors for 3 years, realized he wasn't going to make it, quit, and got his four year degree, and now is part of the working establishment. So now he can get the girl, get engaged, get the ring, the car and the house and live happily ever after, knowing he gave it his best shot.
Does it really matter when you go to college, whether it is before or after baseball? Nowadays, you can do both - baseball starts in February and ends in September. So you can squeeze in some credits in a fall semester each year. All it takes is a motivated son.
My son who has a 96.5 GPA and a 2040 on the new SATs, if drafted, will sign to play professionally and will pursue his degree at the same time.
Sign...Go do it...Get baseball out of your system, whether it is the MLB's choice to cut you or your choice to quit should you not make it to the big show. Who really wants to sit in class so that they can play baseball at the end of the day? Why not just get up and play baseball instead? Don't worry about supplementing the $900 a month salary because you would have to supplement him when he goes to college anyway.