Yeah that was my next move after realising that adding injuries didn't prevent them getting signed again.
As I said, completely minor issue that they're realistically never going to waste resources on. But for someone like me that likes creating NBA worlds that are as realistic as possible, the option to manually set someone to retire would be great. That way you could set this on Rubio, Ross, Griffin, Dragic, Porter Jr etc and they would all retire in the next offseason and, if applicable, start the process of becoming coaches/staff members.