The purpose of this study is to assess magnetic resonance imaging (MRI) as a tool to track tumor growth for renal cell carcinoma while participants are on clinical treatment therapy of sunitinib and AMG386. An MRI is a type of scan that uses powerful magnets to make clearer images or to focus on detailed medical information in the abdomen and pelvis. The imaging done for this study will use the arterial spin labeling (ASL) MRI technique that allows us to see blood flow changes which possibly may indicate changes in tumor growth. Participants will be on a clinical trial for the treatment.