Mello began his jiu-jitsu journey under Carlson Gracie, whose academy stood as the most dominant grappling organization in the world during the 1990s. That environment exposed Mello to elite competition and a culture of toughness that shaped him into a formidable practitioner. In 1994, Carlson Gracie awarded Mello his black belt — a milestone that placed him within one of BJJ's most storied and respected lineages.
His time under Carlson, however, ended in deeply controversial circumstances. Carlson tasked Mello with investigating the fidelity of his girlfriend — a mission Mello carried out as instructed. When he delivered his findings, the response was not gratitude but punishment: Carlson demoted Mello from black belt back to brown belt and expelled him from the academy. The decision was widely perceived as an emotionally driven act, rooted in the painful nature of what Mello had uncovered rather than any deficiency in his conduct or technical ability. The incident stands as one of the more striking examples of the deeply personal dynamics that could define — and destabilize — the master-student relationship in old-school Brazilian jiu-jitsu, and it brought an abrupt, painful end to Mello's chapter within the Carlson Gracie organization.