RecruitingPhase 2Drug trialA Study of Talazoparib With or Without Enzalutamide in People With Prostate Cancer Who Have Previously Received Abiraterone AcetateThe purpose of this study is to find out whether talazoparib in combination with enzalutamide or talazoparib alone delays cancer progression in people with metastatic castration-resistant prostate cancer (mCRPC) who have homologous recombination repair (HRR) mutations and have previously received abiraterone acetate.