Thanks for the suggestion, @Van Banana

It sounds pretty interesting. Such an addition could add some realism in the game, as in real life most of the hardcore football fans own at least one T-shirt with the name of their favorite player on the back. Also, as you point out, it might regulate the income of the clubs and even improve ii.

If the feature is implemented, putting milestones could make the users even more enthusiastic about reaching them and collecting a prize.

Great job!

I will be forwarding your suggestion to the devs!