As you have written it, I do not understand either. What kind of team is it? A sports team?
The only guess I have with the clues you have given would be:
"You are on the seat for a while." That is to say, you are sick, so you will not be able to play. So, you will be on your seat (sitting) for a while (a period of time) until you are better.
Could that have been it?
Student or Learner