There are "some" users, who exploits the current design, and use this design hole to purchase a player every Tuesday, and retire (fire) him each Sunday (after the defined four days) - prior of the weekly expanses payment.
This should be handled.
A player who played needs to be payed for that week.
Firing him means you will need to pay him for that week (in case he played on it).
Ok, lets do this the scholar way, maybe that way we will be able to plunge some knowledge in that blockhead of yours.
First, buy a cheap player, then fire him. After that think about what you wrote on opener.
Quote so you cant edit your newbish suggestion.