Leon Klassen is a 26-year-old professional football player from RUS. He currently plays for Grazer AK, wearing the number 32 shirt. He plays primarily as a Defender. He stands at 173cm tall and weighs 69kg. His preferred foot is Left. His current market value is estimated at 600K .

His most recent move was a Loan from Grazer AK to SV Darmstadt 98 on 2026-06-30.

Throughout the Austrian Bundesliga 2025-2026, Leon Klassen featured in 4 matches, averaging 1 tackles, 1.5 interceptions, and 1.8 clearances per game, while blocking 0.3 shots per game.