Boy do I remember worrying about that freshman tryout and my son is now a sophomore in college. I feel for you and hope things work out for your son.
I had several moms who I talked to during this process that really helped me. The list (posted by tryout number) was posted before school one morning - my son called me on his cell phone to tell me he had made it. I had baseball balloons and a cake waiting for him that night to celebrate.
What I remember most is the kids that didn't make it - how devastated they were (and their parents). Most of them went on to have great high school football careers (one is playing in college). Although this is controversial, some transferred to a private school to play baseball.
I also remember the senior moms inviting the freshman moms to an early dinner/happy hour before the first game to welcome us. Nice gesture on their part.
Good luck and keep us posted!