Overview Study of Nivolumab in Combination w Radium-223 in Men w Metastatic Castration Resistant Prostate Cancer Status: Recruiting Trial end date: 2024-06-15 Target enrollment: Participant gender: Summary This is an open label, prospective, trial that begins with a phase Ib safety run-in followed by a phase II expansion cohort. Phase: Phase 1/Phase 2 Details Lead Sponsor: University of UtahTreatments: Nivolumab