As I mentioned, any player that's refused a call-up under Klinnsman has been effectively banished. Happened to Donovan & Timmy Chandler; Chandler turned down a call-up in 2012 and didn't get another until 2013 and played sporadically afterwards. I feel like there was one or two more that I'm blanking on. JK can be vindictive.
A niggling injury is almost worse because if Mix was to play immediately after, then it'd be apparent it was all a ruse.