Karel Belzik is a 19-year-old professional football player from CZE. He currently plays for Slavia Praha B, wearing the number 14 shirt. At the international level, he represents Czechia Republic U17. He plays primarily as a Defender. He stands at 180cm tall and weighs 69kg. His current market value is estimated at 800K .

Throughout the Chance Národní Liga 2025-2026, Karel Belzik featured in 9 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.