Duffy (hamstring) will make a rehab start Sunday with Double-A Northwest Arkansas.

EDGE Analysis

Duffy has been on the injured list since Aug. 4 and is thus in need of a rehab assignment prior to returning to the majors. It's unclear whether he will join the team after one warmup outing, or if multiple appearances will be required. Eric Skoglund is set to fill his spot in the rotation Sunday.