I think you're right. The Best players get injured more times and most of them need to stop 5,6 days.

Almost of my Am(3) and St(3) had injuries with broken legs. Broken legs, during the official games and the opps players team zero red cards?

Very suspicious, when i never played with less than 95% fitness or moral, and i have 2 identical teams, so i can rotate all the players and dont need to use one player twice.