RecruitingPhase 2Radiation therapyTrial Of Stereotactic Body Radiation Therapy (SBRT) for Oligoprogression on Immune Checkpoint Inhibitors (ICI) in Metastatic Renal Cell CarcinomaThis Phase II trial will evaluate progression-free survival after Stereotactic Body Radiation Therapy to oligoprogressive (1-5) lesions in metastatic renal cell carcinoma patients on any immune checkpoint inhibitor-containing regimen with last dose of systemic therapy within 3 months prior to trial enrollment.