He currently plays for Club Sportivo Trinidense, wearing the number 5 shirt. He plays primarily as a Midfield. He stands at 183cm tall and weighs 80kg. His preferred foot is Right. His current market value is estimated at 300K €.

His most recent move was a Free from Club Guaraní to Club Sportivo Trinidense on 2025-06-30. The reported fee was 0.171M €.

Across 6 appearances in the Paraguayan Primera Division 2026, Nelson Ariel Gauto Castillo registered 1 goals and 1 assists, while completing 3 key passes out of 129 total passes with a passing accuracy of 15.5.