The phrase "roster members" refers to the people who are part of a particular group or team. They are the individuals who have been officially selected or chosen to be part of that group or team. Full definition
Besides the reveal of new roster members, this new trailer gave us a peek at what's at stake for this latest superhero / super villain conflict. (heavy.com)
The week before, we got a glimpse at a few returning roster members during a new story trailer, plus we spotted a few new faces for a split second. (heavy.com)
The other roster members are pretty well - known around the world. (gonintendo.com)