Sunitinib and Capecitabine for First Line Colon Cancer

This study is for patients with metastatic colorectal cancer who have not been treated with chemotherapy for their cancer. The purpose of this study is to find out if Capecitabine and Sunitinib can be used together to improve progression-free survival in colorectal cancer.
All patients will take two medicines (Sunitinib and Capecitabine) by mouth every day until their cancer gets worse.