Mario Sauer is a 22-year-old professional football player from SVK. At the international level, he represents Slovakia U20. He plays primarily as a Midfield. He stands at 180cm tall and weighs 75kg. His preferred foot is Right. His current market value is estimated at 1.5M .

His most recent move was a Transfer from Toulouse FC to 1. FC Kaiserslautern on 2026-08-26.

Across 3 appearances in the UEFA European U21 Championship qualification 2025-2026, Mario Sauer registered 2 goals and 2 assists, while completing 1 key passes out of 1 total passes with a passing accuracy of 0.3.