This could be done by re-thinking the achievements page and adding a feature to unlock a particular League, CL, Cup.. SL, SC... Jersey that, unlock a star when we win the 1st, 3rd... 5th.. 10th league and then every 10 titles... and the other comps could have a similar system..

But, I guess I'll not be wrong saying that this can be only done with one specific jersey per comp.