Groome (back) has been transferred to short-season Lowell for a rehab assignment.
Lowell's season doesn't officially kick off until June 19, at which point Groome will presumably be integrated into the rotation. If he excels through a few appearances, he could rejoin Low-A Greenville. So far this has amounted to a lost season for Groome, so the key will be for him to just remain healthy and pitching, regardless of which level he is at.