The purpose of this study is to find a safe dose of investigational study drug, JNJ- 95298177 when given in combination with investigational drug, JNJ-78278343 in patients with prostate cancer. JNJ-78278343 and JNJ-95298177 are not approved by the United States Food and Drug Administration (FDA). The sponsor, Janssen Research & Development, provides the investigational study treatment, called “JNJ-78278343 and JNJ-95298177”. This is the first time that JNJ-78278343 is being used in combination with JNJ-95298177. Are you Eligible? (Inclusion Criteria) At the time of informed...