It is the responsibility of the Manager to inform parents and players about the schedule and any changes to that schedule. Whether it's done via email, phone call, or text message, the Manager must keep the team informed in the case of scheduling changes or inclement weather.
Every season there is at least one complaint that a team Manager failed to inform a parent/player of a schedule change causing a forfeiture for lack of players, or that player to miss a game.
It is also the responsibility of the Manager to promote the league, and trying to get parents involved with helping out. From Spring cleanup day all the way through the tournament season, there is plenty of field work that has to be done to keep the fields in good shape. The first question everyone has when they come to a Membership meeting is, "Who is responsible for maintaining the fields." The short answer is, we all are.
While the Board of Directors and Managers/Coaches share a great deal of the responsibility in maintaining the fields of play, anyone can contribute by raking the batters box or base areas, lining the field, reporting broken equipment, etc.