The Red Sox think Thornburg may have a nerve issue with his shoulder, Evan Drellich of CSN New England reports.

EDGE Analysis

The team is attempting to figure out what else is going on with Thornburg's ailing shoulder, as he has not heeled as quickly as expected. He is already on the 60-day DL, and at this point it would not be surprising if he ended up being out through the All-Star break.