Bug with Injuries ON and W&T OFF

Currently disabled wear and tear in my dynasty because like all the other sliders for the game, some work, some don't, no one knows what half of them are for. 

But I have INJURIES turned ON with the slider at 55

I am now in Week 8 and there hasn't been an injury, not just on my team but across EVERY TEAM. I been checking weekly and nothing. Even during games I have not even seen a player get knocked out for the game or even for a few plays.