How to Get New Members to Stay?

[Cinnastar047]

Our team has been going through this weird cycle for a few years where every other class has ~15 members on the team, and the other classes will have about 2 members on the team. It's not that we can't attract people, it's that a lot of them will leave after the first few weeks for one reason or another. For example, we started this year with about 20 freshmen and now we are down to 2, 1 of which who has been committed to the team since he started 8th grade. We think we have an idea of what's causing the cycle of no members and tons of members, but we'd like to know what other team do that successfully get their new members to stay. Our usual fall activities include a few offseason events, trying to teach them how to do things that contribute to the team, and planning fun things for the whole team to do, but this year there were a few less fun things to do and all of the freshmen just stopped showing up. Is there anything else we could be doing to get new members to stay on the team?