USK · CZE
Josef is a swimmer from Czechia, a butterfly specialist and a sprinter, whose official competitive record spans 4 seasons, 8 years and 5 meets.
His recorded career begins in 2019 in Mladá Boleslav, where he raced the 50 butterfly in 29.61.
His signature event is the 50 butterfly, his reference distance in butterfly, ahead of the 100 butterfly and 200 butterfly. Butterfly is the backbone of the whole record: 5 recorded swims.
His fastest 50 butterfly stands at 30.64, set in long course (50 m) at Praha - Podolí.
After a 3-year break between 2023 and 2026, he came back to racing and the record picks up again in 2026.
Those meets span 4 different venues (Mladá Boleslav, Praha - Podolí, Kladno and Praha - Podolí Venkovní Bazén).
Still active: the directory includes official activity in the 2026 season. Latest competition: Praha - Podolí venkovní bazén, on June 14, 2026. He holds 5 current event personal bests across 5 verified official swims.