Vizaro was a human boxer who was at one time the reigning Earth champion.[1]
In 2256, following up and comer Walker Smith's victory over Atagi in a match some called "World War 4", it looked as though Smith might actually be able to beat Vizaro himself. SportCorp, looking to protect their significant invested in Vizaro, approached Smith with the suggestion that he should retire for a few years. He refused and so SportCorp tampered with his blood test to make it look like he'd been using adrenals and accused him of working for the Syndicate. The news networks jumped on the story and as a result Walker lost his licence and could not get a legitimate fight for the next two years.