I've been keeping a record of injuries this season (since generally people who aren't having problems don't complain meaning that anecdotal evidence tends to be skewed)

Click image for larger version.  Name: Injury log.PNG  Views: 8  Size: 34.2 KB  ID: 23573.

Roughly an injury every 2nd day for me - which is probably not far off the real life (changing days to weeks) rate in soccer. OK, I've been lucky enough to have farmed a lot packs (I've used 64 this season, have 75 in the bank), so I am able to keep players to 1 match a day most of the time.