A Study of IMC-1121B (Ramucirumab) With or Without Dacarbazine in Metastatic Malignant Melanoma

Inclusion Criteria:

* The participant has histologically or cytologically confirmed melanoma that is stage IV (metastatic)
* The participant has an Eastern Cooperative Oncology Performance Status (ECOG PS) of 0-1
* The participant has completed any prior radiotherapy, biologic/immunotherapy or vaccine therapy (for adjuvant or advanced disease) at least six weeks prior to the first dose of study therapy
* The participant has adequate hematological functions \[absolute neutrophil count (ANC) ≥ 1500 cells/microliter (μL), hemoglobin ≥ 9 grams/deciliter (g/dL) and platelets ≥ 100,000 cells/μL\].
* The participant has adequate hepatic function \[bilirubin within normal limits (WNL), aspartate transaminase (AST) and/or alanine transaminase (ALT) ≤ 2.5 times the upper limit of normal (ULN), or ≤ 5.0 times the ULN if the transaminase elevation is due to liver metastases\]
* The participant has serum creatinine ≤ 1.5 x ULN \[or a calculated creatinine clearance \> 60 milliliters/minute (mL/min)\]
* The participant's urinary protein ≤ 1+ on dipstick or routine urinalysis \[(UA); if urine dipstick or routine analysis is ≥ 2+, a 24-hour urine for protein must demonstrate \< 1000 milligrams (mg) of protein in 24 hours to allow participation in the study\]
* The participant must have adequate coagulation function as defined by International Normalized Ratio (INR) ≤ 1.5 and a partial thromboplastin time (PTT) ≤ 1.5 X ULN

Exclusion Criteria

* The participant has mucosal or intra-ocular melanoma
* The participant has known or suspected brain or leptomeningeal metastases
* The participant has had prior cytotoxic chemotherapy for metastatic malignant melanoma
* The participant has had more than one line of biologic, immunologic or vaccine-based therapy for metastatic malignant melanoma (including therapy for adjuvant or advanced disease)
* The participant has a nonhealing wound or ulcer
* The participant has a known alcohol or drug dependency
* The participant is pregnant or breastfeeding
* The participant has a coexisting medical or psychiatric problem of sufficient severity to limit compliance with the study and/or increase the risks associated with study participation or study drug administration or interfere with the interpretation of study results
* The participant has an ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, symptomatic or poorly controlled cardiac arrhythmia, psychiatric illness/social situations, or any other serious uncontrolled medical disorders in the opinion of the investigator