MRI results revealed a strain in Ryan's left glute Thursday, Dan Hayes of The Athletic reports.
Manager Derek Shelton said Wednesday that Ryan's injury has prevented him from replicating his delivery, and the right-hander is likely to spend time on the injured list now that he's been officially diagnosed with a strain. It's unclear whether he'll need to miss more than the 15-day minimum, but the Twins may provide a return timeline once he officially lands on the IL.