Josef Kolarik is a professional footballer from CZE and is currently 20 years old. He is on the books of Mlada Boleslav and wears shirt number 49. At international level, he features for Czechia Republic U17. His main role on the pitch is Forward. His stronger foot is Right. His estimated market valuation currently stands at 1.2M €.

His latest transfer saw him join Mlada Boleslav from SK Slavia Prague U19 via on 2025-07-01.

During the Czech Chance Liga 2025-2026 campaign, Josef Kolarik made 24 appearances, scoring 2 goals and adding 1 assists. He averaged 0.1 goals per match from 16 shots, with 5 on target.