Big Brother / Little Brother

We did this with freshmen and an upper classman in the past. I think we made sure they were in the same stretch lines (all three levels stretch together before practice) and had them exchange phone numbers. The younger kid was expected to contact the older one if he needed a ride, didn't know a time, etc.

EDIT - we also did this when I was in college in and it was a bit more involved. You'd meet your "big brother" in the first couple days. The big brothers took the little brothers out for some sort of activity on our first off day (after church...christian school). Usually to the beach or a movie if the weather was bad or something (I distinctly remember like 80 of us in a theater watching Super Bad one year). Basically the groups of friends on the team would all hang out and bring their little brothers around so they could get to know older guys and feel comfortable.

In retrospect this was pretty cool; you get a bunch of 18 year olds away from home for the first time generally not knowing anyone and it helps them loosen up.