I have seen there are a few high level teams who trained their player to an impossible attribution levels.

I also aware that they are creating such players trough heavy training regime that require tonnes of fitness boosters in which its generating incomes to Nordeus trough the sales of Fitness boxes.

However the effect on financial advantage to the game developers cannot be the ultimate reason for Nordeus to allow the negatives impact of such activities to ruin the beauty tactical and strategies orientated game ever exist in the World.

Fielding these Mutant players are seen as cheating where it is almost impossibly for a normal player brought trough transfer market to control superman like players.

Unless the admin team introduce a personal instructions option by the team Manager ( similar to managers instruction in the team bonus window) so the manager are able to specifically choose one or two of its player to mark and stop the opposition's, MUTANT player.