KoKa · CZE
Jakub is a swimmer from Czechia, a butterfly specialist and a sprinter, whose official competitive record spans 2 seasons and 2 meets.
His recorded career begins in 2025, and one of his earliest marks still on file is the 50 butterfly in 50.10, raced in Karviná. He started out alongside Kosatky Karviná-oddíl plavání, z.s..
His signature event is the 50 butterfly, the event he has raced the most. Butterfly is the backbone of the whole record: 2 meets and 3 recorded swims.
His fastest 50 butterfly stands at 50.10, set in short course (25 m) at Karviná.
Those meets span 2 different venues (Karviná and Havířov). He has raced for KoKa.
Still active: the directory includes official activity in the 2026 season. The last race on record is dated June 18, 2026 in Karviná, with 2 swims: 1:18.30 in the 50 butterfly and 50.10 in the 50 butterfly, all in short course (25 m) and 1 PB improvement. He holds 1 current event personal bests and 2 all-time PB improvements across 3 verified official swims.