Sequential and Concurrent FOLFOXIRI/Bevacizumab Regimens Versus FOLFOX/Bevacizumab in First-Line Metastatic Colorectal Cancer

Inclusion Criteria:

* Histologically confirmed colorectal cancer with at least one measurable metastatic lesion by RECIST v 1.1, that is considered unresectable at baseline
* Eastern Cooperative Oncology Group (ECOG) performance status 0 or 1 if age less than (\<) 71 years; ECOG status of 0 if age 71 to 75 years
* Adequate hematological, renal and liver function
* Participants with treated brain metastases are eligible for study participation; participants may not receive ongoing treatment with steroids at screening, anticonvulsants (at stable dose) are allowed
* Females of childbearing potential and males must agree to use effective contraception as defined by protocol during the treatment period and for at least 6 months after the last dose of study drug

Exclusion Criteria:

* Any prior treatment for metastatic colorectal cancer, except for use of palliative radiosensitizers
* Adjuvant chemotherapy for colorectal cancer completed \< 12 months prior to study consent
* Sensory peripheral neuropathy greater than or equal to (\>/=) Grade 2
* Evidence of Gilbert's Syndrome or homozygosity for the Uridine 5-diphospho-glucuronosyltransferase (UGT) 1A1\*28 allele
* Positive for human immunodeficiency virus (HIV) infection
* Malignancies other than metastatic colorectal cancer within 5 years prior to randomization, except for adequately treated carcinoma in situ of the cervix, basal or squamous cell skin cancer, localized prostate cancer treated surgically with curative intent, and ductal carcinoma in situ treated surgically with curative intent
* Radiotherapy to any site for any reason within 28 days prior to randomization, except for palliative radiotherapy to bone lesions within 14 days prior to randomization
* Clinically significant third-space fluid collections (e.g. ascites or pleural effusion) that cannot be controlled by drainage or other procedures prior to study entry
* Treatment with any other investigational agent, or participation in another investigational drug trial within 28 days prior to randomization
* Any disease or condition or laboratory finding giving reasonable suspicion of disease or condition that contraindicates the use of bevacizumab or puts the participant at high risk for treatment-related complications
* Inadequately controlled hypertension
* Clinically significant (that is \[i.e.\] active) cardiovascular disease (For example \[e.g.\] cerebrovascular accident or myocardial infarction within 6 months prior to randomization), unstable angina, congestive heart failure (New York Heart Association Class \>/= II) or serious cardiac arrhythmia that is uncontrolled by medication or may interfere with the administration of the study treatment
* Known hypersensitivity to bevacizumab or any of its excipients or any other study drug