This has happened to me before in pervious versions of OOTP, and it just happened to me the other night with the latest patch/version of OOTP12. Same circumstances - my CF gets hurt on the final out of the inning and is due to leadoff the bottom half of the inning, but he gets automatically replaced by my UI.
So contrary to what Markus says, something is happening to make this happen. Everytime it's happened to me, it's been an injury on the final out of an inning with that same player due to lead off in the next half inning.
Hope you can find this in time for OOTP13 Markus - it's very rare but it's annoying to waste a player - if the AI is going to make an injury sub for me, at least make it make sense!
