Docetaxel/prednisone is the standard of care in patients with metastatic, castrate-resistant prostate cancer (CRPC) but duration of response is limited, with median time to prostate-specific antigen (PSA) progression of 6-8 months. There is currently no standard second-line therapy for patients who have progressed after receiving docetaxel. Carboplatin and paclitaxel have demonstrated activity, but prospective clinical trials evaluating this regimen are limited. In addition, correlative studies investigating why some patients respond are lacking.