Its not as much how many injuries but how long, to whom they occur and when they happen.

It is not coincidence that they tend to happen for longer durations near the end of the season. Also, they seem to be targeting the best players more often.

I do agree that they should rename the training sessions to make things more logical and believable if they want to add the touch of realism to the game, because frankly, the results that the NGE give out dont add any realism to this game for the most part.