I would say 80 FB velo is probably in the middle of the pack for freshmen that will end up playing college ball. I really wouldn't worry about it too much, he's young. Skip the showcasing and the expensive camps for now and let the priority be reps and playing time for the time being. Weight lift, train, and proper diet is always the name of the game. Even if he doesn't end up playing a sport anywhere, those are all things you want to learn when you're young, easier to avoid the beer gut than get rid of the beer gut.
He's about 2 full years away from D3 recruiting - they really don't recruit before summer going into senior year. A lot of parents ask - how do I go about getting recruited. The first step is to be a baseball player coaches would want. Right now, nobody needs a 145 lb freshman throwing 78. He just needs time to grow and develop