The Twins and Ft. Myers Miracle announced (via the FSL transaction page at this point) that Nate Roberts has been released.
It's unfortunate, but he just has not been able to stay on the field. He's had several knee surgeries and then the rehabs and even now was putting in a lot of time daily to try to play (or after playing).
Two years ago, he was healthy for the Arizona Fall League, and despite not playing above Low A, he led the league in BA, OBP and SLG!
Best wishes to him!!