If the JC route (sign up the first day of class) is not a option that you would want to go down, it is good that you have some options for school if baseball does not work out. If he attends full time class at a 4 year school, he would have to red shirt if he transfers to a DI school for baseball and his 5 year clock starts.
That being said, different schools have different capabilities of getting athletes in after the normal application dead line.
One Cal State school told us it was too late to get him in a month before school started and one Cal State school got my son into the school Wednesday before school started on Monday!
Another UC school could get in late admits, but took about two months to push through the application even when his brother was a coach there!