I have some friends that “are in the system” there and they can answer any of your questions. Simply put them here and I will relay the questions to them.
One question, how were they able to get on the teams?
for players without scouts after them, how can they showcase their ability and get on these summer teams?
Unless your somebody big you are going to have to try-out, which takes place at one of the fields. If your coach is crazy about you, you could have him rave to one of the officials and then you might have a chance by invitation. However, only the best get those letters.