Mario·Williams is a 34-year-old professional football player from BAR. At the international level, he represents Barbados. He plays primarily as a Midfield. He stands at 185cm tall and weighs 74kg.

His most recent move was a from Weymouth Wales to AC Port of Spain on 2025-10-23.

Across 4 appearances in the FIFA World Cup qualification (CONCACAF) 2026, Mario·Williams registered 0 goals and 0 assists, while completing 2 key passes out of 135 total passes with a passing accuracy of 28.5.