I would say it's a safe bet your son does not have a chance at that particular school. That doesn't mean that he doesn't have a chance at some other school. Without knowing more about your son, particularly his fastball velocity, it's hard to say whether other D1 schools would be interested or not. As many others have said, anyone who wants to play college baseball can find a spot somewhere if they try hard enough to find a match. Depending on the talent of the player, there may be big pool of options or a small pool of options.
Like Buckeye said, it's getting later in the process for a 2015, so you should start making the rounds to schools in your area or ones your son is interested in soon. Like throughout this fall. And as SluggerDad said, there are more options than D1 out there. Start looking into those as well.