First of all Congratulations!!!!
Eight days of tryouts - wow - we had 3. What a long time for you!
Our son also made the team. We are very happy for him. We are able to have workouts preseason. Plus many of the boys played summer ball for the coach.
I had a long sad talk with a good friend whose freshman son was cut. This is a different school, so I don't know what her son was up against. Her son did approach the coach and asked what he needed to work on. The coach said he was not big enough to play baseball. The boy isn't Mr Universe, but he is about 5"7', though he hasn't bulked up. We watched him play for two season. He is a good pitcher and is deceptive on the mound. He is usually very successful, especially in pressure situations. He attended preseason workouts, and had a good tryout according to my friend. I felt so bad for her, and I just didn't know what to say. This is the coach who said they didn't need to work on outfield drills, "anyone can catch a flyball."
Our son played with one who made the team. He tried catching a fly with his eyeball once. Didn't work too well.
About the only thing I could say was to continue to work hard, eat right, and prove the coach wrong at summer tryouts.