I just got an injury to my trainee for 3 weeks and I have a lvl 4 doctor. I wonder what it would have been if I had a lvl 1 doctor...maybe the player would have retired at 25.
The maximum I've seen is 5 weeks with a lvl 5 doctor, which begs the question of how doctors really work.
At any rate this thread is supposed to show the longest injuries seen for each doctor level, so tell us the worst you've seen.