Discussion on injuries can be long. Actually, not much things we can do to avoid them.

Briefly speaking, I would like to remind that there are more injuries near the start and the end of season. Injuries usually appear suddenly in a series. You should carefully manage your red packs specially when series of injuries come. Recommend not to use red packs to heal players with injuries 3 days or less. A theory or other managers' observation is that injury frequency will increase when you have accumulated about 40 red packs. It's true that injury rate is very very high at extreme low condition (say 0 to 15%).

I like the vent thread which used to be pinned at top of this forum. I will shout there when there are many injuries without disturbing other forum users. Injury problem is usual. For a couple of times I had about 15 injuries in one week with players out for total about 50 days.

There are many other discussions about injuries. Besides the links that Gert Funck posted above, I believe it is easy to find with 'injury' as key word.

Good luck.