Topa underwent an MRI on Tuesday that revealed a 25 percent tear in his left patellar tendon, Do-Hyoung Park of MLB.com reports. He'll be immobilized for the next week and isn't expected to resume throwing for another six weeks.
After getting a second opinion on the knee injury, Topa will forgo surgery, but he's still need considerable rest and rehab before being ready to make his season debut. He's currently using crutches and will spent the next week recovering from a platelet-rich plasma injection before he kicks off his ramp-up program. Topa appeared to be on the cusp of rejoining the Twins, but felt discomfort in his knee following the fourth appearance of his rehab assignment May 5 with Triple-A St. Paul and now appears unlikely to be ready for activation until sometime in July.