I have THREE minor suggestions, or actually two minors, and the other I don't know (so perhaps I will ask how it is done).
First: INJURY REPORT (or history, or whatever you want to call it: Is it possible that on the Player's page right menu (where you see the statistics) you can add an Injury report, or actually "Medical History" would be more realistic. This should contain:
-how many times the player has been injured throughout his career.
-how many weeks the player was injured (just a simple count of the weeks number that we normally see when the player is injured)
-how many games the player missed due to injury (or would have missed in case he would be healthy and the manager would have played him).
I think injury-prone players are a lot of just chance, but I'm also suspicious that there is somewhere a "fragility" index or measurement for each players, since I have observed that some players NEVER injure or almost never, while others seem to be enfermery's clients of the month.
Plus, this is very realistic, since every team in the real world looks at the medical history of a player before entering any contract negotiation.