FOLFOX/Bevacizumab +/- MK-0646 in Metastatic Colorectal Cancer

The purpose is to study the efficacy (effectiveness) of a new drug, MK-0646, in metastatic colorectal cancer. MK-0646 is an investigational or experimental anti-cancer agent that has not yet been approved by the U.S. Food and Drug Administration (FDA) for use in metastatic colorectal cancer or any other disease. This study will assess whether adding MK-0646 to an FDA-approved standard of care chemotherapy improves participants' duration of progression-free survival. MK-0646 is believed to inhibit the receptor of a protein called IGF-1 (Insulin-like Growth Factor) which is thought to contribute to cancer development and growth. However, there is no guarantee that MK-0646 will slow cancer development and growth. Other purposes of this study include: * looking at the safety and tolerability of MK-0646 * comparing MK-0646 + standard of care chemotherapy with placebo + standard of care chemotherapy (placebo is a substance that looks like an active drug but has no active ingredient) The standard of care chemotherapy in this study is called FOLFOX 7. FOLFOX 7 includes the drugs oxaliplatin with leucovorin, 5-Fluorouracil (5-FU), and bevacizumab.