The phrase "to make the roster" means to be chosen or selected to be a part of a team, group, or organization.
Sentences with «to make the roster»
And it should come as little surprise that a technology - focused fund makes a roster of socially conscious funds. (kiplinger.com)
Using three of these characters to pad out the roster is a mistake, and a complete waste considering the other characters that didn't make the roster. (gaming-age.com)
They may need to make roster decisions in future years to accommodate that player, but this offseason, they could sign a player to a max contract. (sbnation.com)