45 is faster then he will see until 9/10's. Don't push speed, just work on good form. That means tee work and soft-toss. I still use the soft orange golf whiffle balls with my 14yo daily and he is now playing competitive club ball.


Slammers seems to have a good org, go and take a few lessons, you can also learn from the lessons how to better work with your boy. In the end you will be his coach for life, best get the skills.