Too many to list
As a ring doc for professional mma events (strikeforce, kotc, ufc) I am always seeing "new" injuries.
There are the usual cuts, concussions, etc, but on the last ufc event in seattle a fighter injured the inside of his mouth! it is a very dangerous sport. Any part of the face can be damaged, any joint, any bone or tendon can be injured. Basically they put it all on the line.