Jan Král received his formation at the Czech first division club FC Mladá Boleslav and was loaned to the second division club FC Varnsdorf at the age of 18. He made his professional football debut with FC Varnsdorf on 30 July 2017. In the 2018-2019 season, he played 7 matches with FC Mladá Boleslav in the Fortuna Liga (1st division) and four matches in the 2nd Bundesliga via the loan to Erzgebirge Aue. In January 2020, the transfer to the second division club FC Hradec Králové came about. Here, Jan Král immediately conquered a regular place and achieved promotion to the 1st division with his team in the spring of 2021. The newcomer from KAS Eupen played a total of 32 games in the 2021-2022 season in the Fortuna Liga and in the champions round, scoring 4 goals.
Christoph Henkel, general director of KAS Eupen: “In the course of his still young career, Jan Král has quickly and continuously developed from a youth international to a regular player in the first Czech league. We are confident that he will also prove himself in the Jupiler Pro League and take the next step in his career with us. With his talent, his stature and his goal-scoring ability in standards, he brings with him the best conditions for a player in our defensive center. We look forward to working with Jan Král and welcome him to KAS Eupen.”