All-time roster construction is an exercise that has been going on for years and is not a new concept. Just about every major media entity, fan, etc., has put together their own form of their team's all-time roster or a league's all-time roster.
The Sun Belt's concept is no different. This was a fun, little exercise to pass the time during the coronavirus (COVID-19) pandemic.
If you are a baseball fan, like many, you have toyed with the idea of being manager for a day and attempted to fill out your personal all-time baseball lineup or roster.