Duffy (heel) isn't progressing as quickly as the Rays anticipated and is hoping to resume a rehab assignment next week, Marc Topkin of the Tampa Bay Times reports.
Duffy kicked off his rehab assignment with High-A Charlotte on May 9, but suffered a setback over the weekend after fouling a ball off his foot during batting practice. Though the Rays don't believe the issue will delay Duffy for a significant time, the team will give the infielder a few more days for the soreness to subside. With Brad Miller (abdomen) recently joining Duffy on the disabled list, the Rays will rely on Daniel Robertson and Tim Beckham on an everyday basis in the middle infield.