The term 'on the roster' is used to describe a group of people who are officially part of an organization or team. The four crossword solutions for this term are SLATED, LISTED, ACTIVE, and ENROLLED. To be SLATED means to be officially chosen or appointed to a position. To be LISTED means to be included in a record or list. To be ACTIVE means to be involved in an activity or organization. To be ENROLLED means to be officially registered as a member of an organization.