What level? Never managed, but as an coach, some of the things at the subvarsity level are: Learn to run the book.(make sure to tell the coach when a player from EITHER team has 3 fouls.) Learn to run the clock. Fill the water bottles pregame Be ready to help with, if not be solelt responsible for laundry. Create a pregame checklist of thing to do for both home and away games.
What? The responsibilities of a team manager? This is subvarsity. Varsity level has to run the game camera, as well as help make pregame meals. Our managers were an integral part of my teams.