Lineups need to be posted ahead of time for the purpose of Betting on sites likes Draftkings
In every major sport lineups are posted ahead of time. When people are betting on daily fantasy sports they need to know who is playing ahead of time because there are sites like Draftkings that list multiple players for a position (example Haru/Bubbling, junglers for CJ Entus) and without knowing who is playing ahead of time it's impossible to choose who we should have in the starting lineup, thus making it even more of a guessing game. There should be some standard in regards to starting lineups. I'm sure there is a rule in place that they need to be locked in X amount of time before the game so the other team knows who they're playing against and that information should be made public as well so that people can accurately set up lineups accordingly. It seems pretty minor/easy to implement and it will help betting on games tremendously.