Topa (elbow) had a setback when he experienced soreness while playing catch, Phil Miller of the Minneapolis Star Tribune reports.
Topa missed the first four months of the season due to a tear in the patellar tendon of his left knee. He began a rehab assignment July 23 but was shut down Aug. 10 due to right elbow inflammation. It seems unlikely that he'll be able to return from the injured list before the regular season ends. although the Twins haven't officially ruled it out.