Rosler made a host of changes to his side for Tuesday night's JPT clash with Crawley and the likes of goalkeeper Richard Lee, defenders Scott Barron and Leon Legge and goalscorer Sam Saunders did themselves no harm as the Bees won 1-0.
"The players showed again that football is a squad game, it is not about 11 or 12 players," said Rosler.
"We want to be successful in all competitions, we showed that with the way we performed and these players have put themselves in a good position for Saturday.
"Having had a year with me, I think the players understand better what I like to do and I use every opportunity to explain that we can't use 12 or 13 players for half a season and then pick one who has not played for half a year.
"We have to make sure we keep everybody on their toes and we keep everyone match fit as much as we can. I am a manager who the players can talk to about performances in training and matches, and there will be some interesting decisions for Saturday."
