Josef Kolarik is a 19-year-old professional football player from CZE. He currently plays for Mlada Boleslav, wearing the number 49 shirt. At the international level, he represents Czechia Republic U17. He plays primarily as a Forward. His preferred foot is Right. His current market value is estimated at 1.2M €.

His most recent move was a from SK Slavia Prague U19 to Mlada Boleslav on 2025-06-30.

In the Czech Chance Liga 2025-2026 season, Josef Kolarik scored 2 goals and provided 1 assists across 24 appearances, averaging 0.1 goals per game with 16 shots attempted and 5 on target.